Trapezius Botox (Shoulder Slimming) in Seoul: Coretox for Swan Neck and Elegant Shoulder Line at Rappoel Dermatology<\/title><br \/>\n<meta name=\"description\" content=\"Overdeveloped trapezius making your neck look short and shoulders bulky? Rappoel Dermatology uses Coretox for precise trapezius reduction \u2014 3-4 weeks to sculpt a slender neckline and graceful shoulder contour, no surgery required\">\n<link rel=\"alternate\" hreflang=\"en\" href=\"https:\/\/rappoel-clinic.com\/coretox-trapezius-shoulder-slimming-en\/\" \/>\n<link rel=\"alternate\" hreflang=\"zh-TW\" href=\"https:\/\/rappoel-clinic.com\/coretox-trapezius-shoulder-slimming-zh\/\" \/>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"MedicalClinic\", \"@id\": \"https:\/\/rappoel-clinic.com\/#clinic\", \"name\": \"Rappoel Dermatology Clinic\", \"alternateName\": [\"Rappoel \u76ae\u819a\u79d1\", \"\ub77c\ud3ec\uc5d8 \ud53c\ubd80\uacfc\"], \"url\": \"https:\/\/rappoel-clinic.com\", \"address\": {\"@type\": \"PostalAddress\", \"streetAddress\": \"77, Seocho-daero\", \"addressLocality\": \"Seocho-gu\", \"addressRegion\": \"Seoul\", \"postalCode\": \"06609\", \"addressCountry\": \"KR\"}, \"geo\": {\"@type\": \"GeoCoordinates\", \"latitude\": 37.4926, \"longitude\": 127.0175}, \"telephone\": \"+82-2-XXXX-XXXX\", \"openingHours\": [\"Mo-Fr 10:00-19:00\", \"Sa 10:00-17:00\"], \"medicalSpecialty\": \"Dermatology\", \"availableService\": [{\"@type\": \"MedicalProcedure\", \"name\": \"Thread Lift (Aptos)\"}, {\"@type\": \"MedicalProcedure\", \"name\": \"Hyaluronic Acid Filler\"}, {\"@type\": \"MedicalProcedure\", \"name\": \"Botulinum Toxin (Botox)\"}, {\"@type\": \"MedicalProcedure\", \"name\": \"Ultherapy \/ HIFU\"}, {\"@type\": \"MedicalProcedure\", \"name\": \"Skin Booster (Juvelook \/ Exosomes)\"}, {\"@type\": \"MedicalProcedure\", \"name\": \"Laser Skin Treatment\"}, {\"@type\": \"MedicalProcedure\", \"name\": \"Onda Coolwaves Body Contouring\"}], \"sameAs\": [\"https:\/\/www.instagram.com\/rappoel_official\"]}<\/script><br \/>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"Article\", \"headline\": \"Trapezius Botox (Shoulder Slimming) in Seoul: Coretox for Swan Neck and Elegant Shoulder Line at Rappoel Dermatology\", \"description\": \"Overdeveloped trapezius making your neck look short and shoulders bulky? Rappoel Dermatology uses Coretox for precise trapezius reduction \u2014 3-4 weeks to sculpt a slender neckline and graceful shoulder contour, no surgery required\", \"inLanguage\": \"en\", \"author\": {\"@type\": \"Organization\", \"name\": \"Rappoel Dermatology Clinic\"}, \"publisher\": {\"@type\": \"Organization\", \"name\": \"Rappoel Dermatology Clinic\", \"logo\": {\"@type\": \"ImageObject\", \"url\": \"https:\/\/rappoel-clinic.com\/wp-content\/uploads\/2026\/04\/favicon-512.png\"}}, \"about\": {\"@id\": \"https:\/\/rappoel-clinic.com\/#clinic\"}}<\/script><br \/>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"How is trapezius Botox different from calf Botox?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Different target muscles and dosing: (1) Target \u2014 trapezius Botox treats the upper trapezius (the most superficial neck-shoulder muscle); calf Botox treats the gastrocnemius (the superficial posterior calf muscle). (2) Dosing \u2014 trapezius: 100-150 units Coretox per side (200-300 total); calves: 50-80 units Coretox per side (100-160 total). Why the higher dose for shoulders? The upper trapezius belly is substantially larger than the gastrocnemius; 50 units per side simply cannot cover sufficient muscle fibers. Both can be performed on the same day (no drug interaction, different target regions), but combining shoulders + calves + face on the same day is not recommended \u2014 cumulative dosing may approach the clinical single-session safety ceiling (conservatively recommended under 500 units total).\"}}, {\"@type\": \"Question\", \"name\": \"How much can trapezius Botox slim? When will I see results?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"First-session results at 3-4 months: trapezius volume reduction approximately 20-40% (individual variation), with corresponding visual changes \u2014 neck appears approximately 1-2cm longer (as the cervical length previously buried under trapezius bulk is re-exposed), clavicles appear more prominent with enhanced horizontal visual extension, the lateral clavicle third transforms from a rounded muscular covering to a sharp bony contour, and shoulder lines in tank tops and off-shoulder styles shift from thick and round to flat and elegant. Timeline: Week 1 \u2014 no visible change (botulinum toxin requires 5-7 days for complete SNAP-25 cleavage). Week 3 \u2014 palpating the shoulders, the trapezius feels softer, without the previous hard bulk. Week 4 \u2014 shoulder appearance begins changing; neckline-collar junction looks cleaner in T-shirts. Weeks 8-10 \u2014 results become obvious; friends may ask if you've lost weight. Weeks 12-14 \u2014 peak result, shoulder contour at its most elegant. Thereafter, gradual recovery to approximately 70-80% of pre-treatment volume at 6-8 months, when a second touch-up is considered.\"}}, {\"@type\": \"Question\", \"name\": \"Is Coretox trapezius slimming safe? Will it affect my daily activities?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Very safe \u2014 the protocol is specifically designed for function preservation, targeting only the upper trapezius while sparing the middle and lower trapezius. Post-treatment activity assessment: carrying bags\/ luggage \u2014 unaffected (middle and lower trapezius compensates). Getting dressed and brushing hair \u2014 unaffected. Driving \u2014 unaffected. Typing and desk work \u2014 unaffected. Overhead arm reach \u2014 normal. Shoulder shrug \u2014 mildly reduced force sensation but not absent. The only transient change: approximately 10-15% of clients report mild shoulder soreness 2-3 days post-injection (similar to a stiff neck), which self-resolves \u2014 this is a normal response to needle trauma, not an adverse toxin reaction. Contraindications: no massage or heavy shoulder pressure for 24 hours; no upper-body strength training for 3 days.\"}}, {\"@type\": \"Question\", \"name\": \"How long does one trapezius Botox session last? Is there dependency with repeated treatments?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"First session lasts 6-8 months. Good news: as with calf and jaw Botox, trapezius slimming exhibits a cumulative effect \u2014 after the first atrophy cycle, even as the toxin metabolizes, the muscle does not fully return to its original volume because: (1) vascular and neural re-innervation after a 6-month dormant period is less complete than the original. (2) Behavioral adaptation \u2014 after slimming, the trapezius is no longer your default recruitment muscle. Actual data: first session \u2014 6-8 months; second touch-up \u2014 8-10 months; third and beyond \u2014 10-14 months or more. There is no physiological dependency \u2014 botulinum toxin is not a hormone; it doesn't create escalating need. Any perceived dependency is purely psychological \u2014 once you've experienced elegant shoulder lines, returning to the original state feels insufficient. This psychological 'preference' and pharmacological dependency are fundamentally different concepts.\"}}, {\"@type\": \"Question\", \"name\": \"Who is a good candidate for trapezius Botox? How do I self-assess?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Quick self-assessment: wear a tank top and stand before a mirror \u2014 if the top of your shoulders (upper trapezius zone) presents as a triangular thickening \u2192 trapezius hypertrophy, suitable for slimming. Self-test: place your hands naturally atop the trapezius muscles on either side of your neck \u2192 forcefully shrug your shoulders \u2192 if the muscle mass you feel is large and hard, and retains some volume even at rest \u2192 suitable for trapezius Botox. Important differentials: simple broad shoulders (large skeletal frame \u2192 Botox ineffective). Dowager's hump (prominent posterior cervical fat pad \u2192 requires lipolysis, not Botox). Rounded shoulders\/forward posture (postural issue \u2192 requires physiotherapy, not Botox). Rappoel's in-person assessment can accurately determine your type and the appropriate treatment plan.\"}}]}<\/script><\/p>\n<style>\n*{box-sizing:border-box;margin:0;padding:0}\nbody{font-family:'PingFang SC','Noto Sans KR',sans-serif;background:#fffcf7;color:#3d2e1e;line-height:1.8}\n.wrap{max-width:677px;margin:0 auto;padding:32px 20px 60px}\n.banner{background:#FFF8EC;text-align:center;padding:36px 20px 28px;margin-bottom:36px;border-bottom:1px solid #e8d5c0}\n.banner-tag{font-size:11px;letter-spacing:3px;color:#8B7355;text-transform:uppercase;margin-bottom:12px}\n.banner h1{font-size:24px;color:#3d2e1e;line-height:1.4;margin-bottom:12px}\n.banner .sub{font-size:13px;color:#6b5240;line-height:1.7}\nh2{font-size:19px;color:#3d2e1e;margin:32px 0 14px;padding-bottom:8px;border-bottom:1px solid #e8d5c0}\nh3{font-size:16px;color:#3d2e1e;margin:22px 0 10px}\np{font-size:15px;color:#555;line-height:1.9;margin-bottom:14px}\n.highlight{background:#fff;border:1px solid #f0e8dc;border-left:3px solid #D4A574;padding:16px 20px;margin:22px 0;border-radius:0 6px 6px 0}\n.highlight p{margin:0;font-size:14px;color:#6b5240}\n.card{background:#F5E6C8;border:1px solid #e8d5c0;border-radius:8px;padding:18px 22px;margin:16px 0}\n.card-title{font-size:13px;font-weight:700;color:#3d2e1e;margin-bottom:6px}\n.card p{font-size:14px;margin:0}\n.faq-item{margin:14px 0;border-bottom:1px solid #f0e8dc;padding-bottom:14px}\n.faq-q{font-weight:700;color:#3d2e1e;font-size:15px;margin-bottom:6px}\n.faq-a{font-size:14px;color:#555;line-height:1.8}\n.cta{background:#F5E6C8;text-align:center;padding:32px 20px;margin-top:40px;border-radius:8px}\n.cta h3{font-size:17px;color:#3d2e1e;margin-bottom:8px}\n.cta p{font-size:13px;color:#6b5240;margin-bottom:4px}\nimg{max-width:100%;height:auto;display:block;margin:20px auto;border-radius:6px}\nul,ol{padding-left:22px;margin-bottom:14px}\nli{font-size:15px;color:#555;line-height:1.9;margin-bottom:4px}\n.schema-block{display:none}\n@media(max-width:600px){.wrap{padding:20px 14px 40px}.banner h1{font-size:20px}}\n<\/style>\n<p><\/head><br \/>\n<body><\/p>\n<div class=\"wrap\">\n<div class=\"banner\">\n<div class=\"banner-tag\">Botox<\/div>\n<h1>Trapezius Botox (Shoulder Slimming) in Seoul: Coretox for Swan Neck and Elegant Shoulder Line at Rappoel Dermatology<\/h1>\n<div class=\"sub\">Overdeveloped trapezius making your neck look short and shoulders bulky? Rappoel Dermatology uses Coretox for precise trapezius reduction \u2014 3-4 weeks to sculpt a slender neckline and graceful shoulder contour, no surgery required<\/div>\n<\/p><\/div>\n<p>Trapezius hypertrophy is among the most common yet most overlooked postural aesthetic concerns for Asian women. An overdeveloped trapezius makes the neck appear short and thick, blurs the neck-shoulder transition, and widens the upper-body silhouette from behind \u2014 a phenomenon colloquially known in Korean as ‘watermelon shoulders’ (\uc218\ubc15\uc5b4\uae68). Trapezius hypertrophy stems from two primary causes: (1) Postural compensation \u2014 prolonged desk work and smartphone use (‘tech neck’), where every 1cm of forward head posture adds approximately 2.5kg of extra load on the upper trapezius to maintain cranial balance, chronically stimulating compensatory muscle hyperplasia. (2) Stress-induced overuse \u2014 habitual shoulder shrugging, heavy lifting, and incorrect gym form (excessive barbell shrugs, compensatory lateral raises) that over-recruit the trapezius. Rappoel Dermatology near Gangnam Station, Seoul, uses Korean-manufactured Coretox (botulinum toxin type A) precisely injected into the upper trapezius, reducing muscle volume through reversible neuromuscular blockade \u2014 no pills, no surgery, 28 days from watermelon shoulders to swan neck.<\/p>\n<h2>Coretox Trapezius Slimming Mechanism \u2014 More Than Just Dissolving Muscle<\/h2>\n<ul>\n<li><strong>Precision neuromuscular junction blockade:<\/strong> After injection, Coretox’s heavy chain binds to specific SV2 receptors on motor nerve terminal presynaptic membranes, the light chain enters the cytoplasm and cleaves SNAP-25 protein, preventing acetylcholine-containing vesicles from fusing with the presynaptic membrane \u2014 nerve impulses cannot reach muscle fibers, and the muscle enters a state of functional dormancy<\/li>\n<li><strong>Selective atrophy (upper trapezius only):<\/strong> Rappoel’s injection protocol is precisely confined to the upper trapezius \u2014 the culprit behind the rounded, bulky shoulder appearance. The middle and lower trapezius (maintaining scapular stability and shoulder joint function), as well as the deeper levator scapulae and rhomboids (core postural muscles of the neck), are deliberately spared<\/li>\n<li><strong>Function-preserving design:<\/strong> The upper trapezius contributes approximately 30% of shoulder-shrugging strength \u2014 when suppressed by Coretox, this function is compensated by the middle and lower trapezius; daily activities (carrying bags, getting dressed, brushing hair) remain unaffected. Only the shoulder shrug motion shows mildly reduced force \u2014 but the upper trapezius itself is essentially an aesthetic rather than functionally essential muscle<\/li>\n<li><strong>Gradual volumetric reduction:<\/strong> After losing neural input, the muscle enters disuse atrophy \u2014 myofibril count remains unchanged, but individual fiber diameter shrinks, sarcoplasmic reticulum and glycogen stores decrease, and overall muscle volume reduces by approximately 20-40% over 4-8 weeks. The atrophy is uniform (multi-point injection strategy) \u2014 no focal depressions occur<\/li>\n<\/ul>\n<h2>Rappoel Coretox Trapezius Slimming Advantages<\/h2>\n<ul>\n<li><strong>High-purity Korean Coretox:<\/strong> Triple-chromatography purification yields ultra-low impurity protein content, drastically reducing antibody-formation (immunogenicity) risk \u2014 trapezius treatments require high doses (100-150 units per side), making purity critical<\/li>\n<li><strong>Ultrasound-guided injection:<\/strong> The physician uses musculoskeletal ultrasound for real-time needle-tip visualization, confirming exact upper trapezius muscle belly depth (approximately 1.5-2.5cm below the superficial fascia) \u2014 avoiding superficial injection (subcutaneous fat \u2014 ineffective) and overly deep injection (levator scapulae \u2014 unwanted functional muscle involvement)<\/li>\n<li><strong>Multi-point uniform distribution:<\/strong> 15-25 injection points per trapezius, 4-6 units each, evenly distributed along a crescent-shaped zone from above the lateral third of the clavicle to the acromion line \u2014 ensuring synchronous uniform atrophy across the entire muscle region<\/li>\n<li><strong>Symmetry precision:<\/strong> Most individuals already have 5-10% bilateral trapezius volume asymmetry (dominant-hand side slightly larger); Rappoel measures the difference through pre-injection postural assessment and adjusts dosing \u2014 the dominant side receives 5-10 additional units, achieving bilateral symmetry post-treatment<\/li>\n<li><strong>Postural rehabilitation synergy:<\/strong> After trapezius atrophy, cervical hypertonicity is relieved \u2014 many clients report unexpected improvement in long-standing neck and shoulder stiffness and soreness 2-3 weeks post-injection, as this was fundamentally caused by chronic muscle tension and spasm<\/li>\n<\/ul>\n<h2>Rappoel Coretox Trapezius Slimming Protocol<\/h2>\n<ol>\n<li><strong>Neck-shoulder postural assessment (10 min):<\/strong> Standing before a postural assessment grid \u2014 baseline photography from frontal, lateral, and posterior views \u2192 bilateral trapezius volume, cervico-shoulder angle, and clavicle exposure measured \u2192 per-side dosing plan formulated<\/li>\n<li><strong>Ultrasound injection mapping (5 min):<\/strong> Musculoskeletal ultrasound probe scanning upper trapezius from lateral clavicle third to acromion line \u2192 muscle belly contour marked on skin \u2192 15-25 injection points marked per side<\/li>\n<li><strong>Disinfection and Coretox multi-point injection (10-15 min):<\/strong> Povidone-iodine preparation of shoulder and neck skin \u2192 30G ultra-fine needle for injection at marked points, 4-6 units Coretox each, needle tip precisely at muscle belly depth (verified by ultrasound)<\/li>\n<li><strong>Compression and observation (5 min):<\/strong> Cotton swab compression 15 seconds per point for hemostasis \u2192 client instructed to keep shoulders still for 5 minutes for uniform toxin diffusion within muscle<\/li>\n<li><strong>Aftercare instruction and photography (5 min):<\/strong> No massage or heavy pressure on shoulders for 24 hours, no upper-body strength training for 3 days, immediate post-treatment baseline photography \u2192 4-week follow-up appointment for result assessment<\/li>\n<\/ol>\n<p>Coretox trapezius slimming is one of Rappoel’s most popular summer treatments \u2014 if you’re planning elegant off-shoulder looks for a wedding, graduation photos, or beach vacation, schedule your treatment 2-3 months ahead for optimal atrophy by the big day. Located a 3-minute walk from Gangnam Station Exit 10, with seamless English and Chinese consultation.<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<div class=\"faq-item\">\n<div class=\"faq-q\">How is trapezius Botox different from calf Botox?<\/div>\n<div class=\"faq-a\">Different target muscles and dosing: (1) Target \u2014 trapezius Botox treats the upper trapezius (the most superficial neck-shoulder muscle); calf Botox treats the gastrocnemius (the superficial posterior calf muscle). (2) Dosing \u2014 trapezius: 100-150 units Coretox per side (200-300 total); calves: 50-80 units Coretox per side (100-160 total). Why the higher dose for shoulders? The upper trapezius belly is substantially larger than the gastrocnemius; 50 units per side simply cannot cover sufficient muscle fibers. Both can be performed on the same day (no drug interaction, different target regions), but combining shoulders + calves + face on the same day is not recommended \u2014 cumulative dosing may approach the clinical single-session safety ceiling (conservatively recommended under 500 units total).<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">How much can trapezius Botox slim? When will I see results?<\/div>\n<div class=\"faq-a\">First-session results at 3-4 months: trapezius volume reduction approximately 20-40% (individual variation), with corresponding visual changes \u2014 neck appears approximately 1-2cm longer (as the cervical length previously buried under trapezius bulk is re-exposed), clavicles appear more prominent with enhanced horizontal visual extension, the lateral clavicle third transforms from a rounded muscular covering to a sharp bony contour, and shoulder lines in tank tops and off-shoulder styles shift from thick and round to flat and elegant. Timeline: Week 1 \u2014 no visible change (botulinum toxin requires 5-7 days for complete SNAP-25 cleavage). Week 3 \u2014 palpating the shoulders, the trapezius feels softer, without the previous hard bulk. Week 4 \u2014 shoulder appearance begins changing; neckline-collar junction looks cleaner in T-shirts. Weeks 8-10 \u2014 results become obvious; friends may ask if you’ve lost weight. Weeks 12-14 \u2014 peak result, shoulder contour at its most elegant. Thereafter, gradual recovery to approximately 70-80% of pre-treatment volume at 6-8 months, when a second touch-up is considered.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Is Coretox trapezius slimming safe? Will it affect my daily activities?<\/div>\n<div class=\"faq-a\">Very safe \u2014 the protocol is specifically designed for function preservation, targeting only the upper trapezius while sparing the middle and lower trapezius. Post-treatment activity assessment: carrying bags\/ luggage \u2014 unaffected (middle and lower trapezius compensates). Getting dressed and brushing hair \u2014 unaffected. Driving \u2014 unaffected. Typing and desk work \u2014 unaffected. Overhead arm reach \u2014 normal. Shoulder shrug \u2014 mildly reduced force sensation but not absent. The only transient change: approximately 10-15% of clients report mild shoulder soreness 2-3 days post-injection (similar to a stiff neck), which self-resolves \u2014 this is a normal response to needle trauma, not an adverse toxin reaction. Contraindications: no massage or heavy shoulder pressure for 24 hours; no upper-body strength training for 3 days.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">How long does one trapezius Botox session last? Is there dependency with repeated treatments?<\/div>\n<div class=\"faq-a\">First session lasts 6-8 months. Good news: as with calf and jaw Botox, trapezius slimming exhibits a cumulative effect \u2014 after the first atrophy cycle, even as the toxin metabolizes, the muscle does not fully return to its original volume because: (1) vascular and neural re-innervation after a 6-month dormant period is less complete than the original. (2) Behavioral adaptation \u2014 after slimming, the trapezius is no longer your default recruitment muscle. Actual data: first session \u2014 6-8 months; second touch-up \u2014 8-10 months; third and beyond \u2014 10-14 months or more. There is no physiological dependency \u2014 botulinum toxin is not a hormone; it doesn’t create escalating need. Any perceived dependency is purely psychological \u2014 once you’ve experienced elegant shoulder lines, returning to the original state feels insufficient. This psychological ‘preference’ and pharmacological dependency are fundamentally different concepts.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Who is a good candidate for trapezius Botox? How do I self-assess?<\/div>\n<div class=\"faq-a\">Quick self-assessment: wear a tank top and stand before a mirror \u2014 if the top of your shoulders (upper trapezius zone) presents as a triangular thickening \u2192 trapezius hypertrophy, suitable for slimming. Self-test: place your hands naturally atop the trapezius muscles on either side of your neck \u2192 forcefully shrug your shoulders \u2192 if the muscle mass you feel is large and hard, and retains some volume even at rest \u2192 suitable for trapezius Botox. Important differentials: simple broad shoulders (large skeletal frame \u2192 Botox ineffective). Dowager’s hump (prominent posterior cervical fat pad \u2192 requires lipolysis, not Botox). Rounded shoulders\/forward posture (postural issue \u2192 requires physiotherapy, not Botox). Rappoel’s in-person assessment can accurately determine your type and the appropriate treatment plan.<\/div>\n<\/div>\n<div class=\"cta\">\n<h3>Overdeveloped trapezius, heavy neck-shoulder silhouette, vanished collarbones? Rappoel Coretox trapezius slimming \u2014 28 days to reshape a slender, elegant swan neck and shoulder line!<\/h3>\n<p>\ud83d\udccd 77, Seocho-daero, Seocho-gu, Seoul, South Korea<\/p>\n<p>\ud83d\udd50 Mon\u2013Fri 10:00\u201319:00 \u00b7 Sat 10:00\u201317:00<\/p>\n<p>\ud83d\udcac WeChat Main: rappoelkr | WeChat Backup: rappoelkr2 | LINE: rappoelkr<\/p>\n<p style=\"margin-top:16px;font-size:13px;color:#8B7355;\">Scan to connect with us<\/p>\n<div style=\"display:flex;justify-content:center;gap:16px;flex-wrap:wrap;margin-top:10px;\">\n<div style=\"text-align:center;\">\n <img decoding=\"async\" src=\"https:\/\/rappoel-clinic.com\/wp-content\/uploads\/2026\/04\/Rappoel\u5fae\u4fe1\u4e8c\u7ef4\u7801\uff08\u4e3b\u53f7\uff09-1.png\" alt=\"WeChat Main QR Code\" style=\"width:120px;height:120px;border-radius:6px;\" \/><\/p>\n<p style=\"font-size:11px;color:#6b5240;margin-top:4px;\">WeChat (Main)<\/p>\n<\/p><\/div>\n<div style=\"text-align:center;\">\n <img decoding=\"async\" src=\"https:\/\/rappoel-clinic.com\/wp-content\/uploads\/2026\/04\/Rappoel\u5fae\u4fe1\u4e8c\u7ef4\u7801\uff08\u5907\u7528\u53f7\uff09-1.png\" alt=\"WeChat Backup QR Code\" style=\"width:120px;height:120px;border-radius:6px;\" \/><\/p>\n<p style=\"font-size:11px;color:#6b5240;margin-top:4px;\">WeChat (Backup)<\/p>\n<\/p><\/div>\n<div style=\"text-align:center;\">\n <img decoding=\"async\" src=\"https:\/\/rappoel-clinic.com\/wp-content\/uploads\/2026\/04\/Line\u4e8c\u7ef4\u7801-1.jpg\" alt=\"LINE QR Code\" style=\"width:120px;height:120px;border-radius:6px;\" \/><\/p>\n<p style=\"font-size:11px;color:#6b5240;margin-top:4px;\">LINE<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n<\/div>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overdeveloped trapezius making your neck look short and shoulders bulky? Rappoel Dermatology uses Coretox for precise trapezius reduction \u2014 3-4 weeks to sculpt a slender neckline and graceful shoulder contour, no surgery required<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[66],"tags":[],"class_list":["post-1576","post","type-post","status-publish","format-standard","hentry","category-botox-en"],"_links":{"self":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1576","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/comments?post=1576"}],"version-history":[{"count":1,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1576\/revisions"}],"predecessor-version":[{"id":1580,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1576\/revisions\/1580"}],"wp:attachment":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/media?parent=1576"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/categories?post=1576"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/tags?post=1576"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":1576,"date":"2026-07-31T10:50:14","date_gmt":"2026-07-31T01:50:14","guid":{"rendered":"https:\/\/rappoel-clinic.com\/coretox-trapezius-shoulder-slimming-en\/"},"modified":"2026-07-31T10:50:17","modified_gmt":"2026-07-31T01:50:17","slug":"coretox-trapezius-shoulder-slimming-en","status":"publish","type":"post","link":"https:\/\/rappoel-clinic.com\/en\/coretox-trapezius-shoulder-slimming-en\/","title":{"rendered":"Trapezius Botox (Shoulder Slimming) in Seoul: Coretox for Swan Neck and Elegant Shoulder Line at Rappoel Dermatology"},"content":{"rendered":"

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\nTrapezius Botox (Shoulder Slimming) in Seoul: Coretox for Swan Neck and Elegant Shoulder Line at Rappoel Dermatology<\/title><br \/>\n<meta name=\"description\" content=\"Overdeveloped trapezius making your neck look short and shoulders bulky? Rappoel Dermatology uses Coretox for precise trapezius reduction \u2014 3-4 weeks to sculpt a slender neckline and graceful shoulder contour, no surgery required\">\n<link rel=\"alternate\" hreflang=\"en\" href=\"https:\/\/rappoel-clinic.com\/coretox-trapezius-shoulder-slimming-en\/\" \/>\n<link rel=\"alternate\" hreflang=\"zh-TW\" href=\"https:\/\/rappoel-clinic.com\/coretox-trapezius-shoulder-slimming-zh\/\" \/>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"MedicalClinic\", \"@id\": \"https:\/\/rappoel-clinic.com\/#clinic\", \"name\": \"Rappoel Dermatology Clinic\", \"alternateName\": [\"Rappoel \u76ae\u819a\u79d1\", \"\ub77c\ud3ec\uc5d8 \ud53c\ubd80\uacfc\"], \"url\": \"https:\/\/rappoel-clinic.com\", \"address\": {\"@type\": \"PostalAddress\", \"streetAddress\": \"77, Seocho-daero\", \"addressLocality\": \"Seocho-gu\", \"addressRegion\": \"Seoul\", \"postalCode\": \"06609\", \"addressCountry\": \"KR\"}, \"geo\": {\"@type\": \"GeoCoordinates\", \"latitude\": 37.4926, \"longitude\": 127.0175}, \"telephone\": \"+82-2-XXXX-XXXX\", \"openingHours\": [\"Mo-Fr 10:00-19:00\", \"Sa 10:00-17:00\"], \"medicalSpecialty\": \"Dermatology\", \"availableService\": [{\"@type\": \"MedicalProcedure\", \"name\": \"Thread Lift (Aptos)\"}, {\"@type\": \"MedicalProcedure\", \"name\": \"Hyaluronic Acid Filler\"}, {\"@type\": \"MedicalProcedure\", \"name\": \"Botulinum Toxin (Botox)\"}, {\"@type\": \"MedicalProcedure\", \"name\": \"Ultherapy \/ HIFU\"}, {\"@type\": \"MedicalProcedure\", \"name\": \"Skin Booster (Juvelook \/ Exosomes)\"}, {\"@type\": \"MedicalProcedure\", \"name\": \"Laser Skin Treatment\"}, {\"@type\": \"MedicalProcedure\", \"name\": \"Onda Coolwaves Body Contouring\"}], \"sameAs\": [\"https:\/\/www.instagram.com\/rappoel_official\"]}<\/script><br \/>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"Article\", \"headline\": \"Trapezius Botox (Shoulder Slimming) in Seoul: Coretox for Swan Neck and Elegant Shoulder Line at Rappoel Dermatology\", \"description\": \"Overdeveloped trapezius making your neck look short and shoulders bulky? Rappoel Dermatology uses Coretox for precise trapezius reduction \u2014 3-4 weeks to sculpt a slender neckline and graceful shoulder contour, no surgery required\", \"inLanguage\": \"en\", \"author\": {\"@type\": \"Organization\", \"name\": \"Rappoel Dermatology Clinic\"}, \"publisher\": {\"@type\": \"Organization\", \"name\": \"Rappoel Dermatology Clinic\", \"logo\": {\"@type\": \"ImageObject\", \"url\": \"https:\/\/rappoel-clinic.com\/wp-content\/uploads\/2026\/04\/favicon-512.png\"}}, \"about\": {\"@id\": \"https:\/\/rappoel-clinic.com\/#clinic\"}}<\/script><br \/>\n<script type=\"application\/ld+json\">{\"@context\": \"https:\/\/schema.org\", \"@type\": \"FAQPage\", \"mainEntity\": [{\"@type\": \"Question\", \"name\": \"How is trapezius Botox different from calf Botox?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Different target muscles and dosing: (1) Target \u2014 trapezius Botox treats the upper trapezius (the most superficial neck-shoulder muscle); calf Botox treats the gastrocnemius (the superficial posterior calf muscle). (2) Dosing \u2014 trapezius: 100-150 units Coretox per side (200-300 total); calves: 50-80 units Coretox per side (100-160 total). Why the higher dose for shoulders? The upper trapezius belly is substantially larger than the gastrocnemius; 50 units per side simply cannot cover sufficient muscle fibers. Both can be performed on the same day (no drug interaction, different target regions), but combining shoulders + calves + face on the same day is not recommended \u2014 cumulative dosing may approach the clinical single-session safety ceiling (conservatively recommended under 500 units total).\"}}, {\"@type\": \"Question\", \"name\": \"How much can trapezius Botox slim? When will I see results?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"First-session results at 3-4 months: trapezius volume reduction approximately 20-40% (individual variation), with corresponding visual changes \u2014 neck appears approximately 1-2cm longer (as the cervical length previously buried under trapezius bulk is re-exposed), clavicles appear more prominent with enhanced horizontal visual extension, the lateral clavicle third transforms from a rounded muscular covering to a sharp bony contour, and shoulder lines in tank tops and off-shoulder styles shift from thick and round to flat and elegant. Timeline: Week 1 \u2014 no visible change (botulinum toxin requires 5-7 days for complete SNAP-25 cleavage). Week 3 \u2014 palpating the shoulders, the trapezius feels softer, without the previous hard bulk. Week 4 \u2014 shoulder appearance begins changing; neckline-collar junction looks cleaner in T-shirts. Weeks 8-10 \u2014 results become obvious; friends may ask if you've lost weight. Weeks 12-14 \u2014 peak result, shoulder contour at its most elegant. Thereafter, gradual recovery to approximately 70-80% of pre-treatment volume at 6-8 months, when a second touch-up is considered.\"}}, {\"@type\": \"Question\", \"name\": \"Is Coretox trapezius slimming safe? Will it affect my daily activities?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Very safe \u2014 the protocol is specifically designed for function preservation, targeting only the upper trapezius while sparing the middle and lower trapezius. Post-treatment activity assessment: carrying bags\/ luggage \u2014 unaffected (middle and lower trapezius compensates). Getting dressed and brushing hair \u2014 unaffected. Driving \u2014 unaffected. Typing and desk work \u2014 unaffected. Overhead arm reach \u2014 normal. Shoulder shrug \u2014 mildly reduced force sensation but not absent. The only transient change: approximately 10-15% of clients report mild shoulder soreness 2-3 days post-injection (similar to a stiff neck), which self-resolves \u2014 this is a normal response to needle trauma, not an adverse toxin reaction. Contraindications: no massage or heavy shoulder pressure for 24 hours; no upper-body strength training for 3 days.\"}}, {\"@type\": \"Question\", \"name\": \"How long does one trapezius Botox session last? Is there dependency with repeated treatments?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"First session lasts 6-8 months. Good news: as with calf and jaw Botox, trapezius slimming exhibits a cumulative effect \u2014 after the first atrophy cycle, even as the toxin metabolizes, the muscle does not fully return to its original volume because: (1) vascular and neural re-innervation after a 6-month dormant period is less complete than the original. (2) Behavioral adaptation \u2014 after slimming, the trapezius is no longer your default recruitment muscle. Actual data: first session \u2014 6-8 months; second touch-up \u2014 8-10 months; third and beyond \u2014 10-14 months or more. There is no physiological dependency \u2014 botulinum toxin is not a hormone; it doesn't create escalating need. Any perceived dependency is purely psychological \u2014 once you've experienced elegant shoulder lines, returning to the original state feels insufficient. This psychological 'preference' and pharmacological dependency are fundamentally different concepts.\"}}, {\"@type\": \"Question\", \"name\": \"Who is a good candidate for trapezius Botox? How do I self-assess?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Quick self-assessment: wear a tank top and stand before a mirror \u2014 if the top of your shoulders (upper trapezius zone) presents as a triangular thickening \u2192 trapezius hypertrophy, suitable for slimming. Self-test: place your hands naturally atop the trapezius muscles on either side of your neck \u2192 forcefully shrug your shoulders \u2192 if the muscle mass you feel is large and hard, and retains some volume even at rest \u2192 suitable for trapezius Botox. Important differentials: simple broad shoulders (large skeletal frame \u2192 Botox ineffective). Dowager's hump (prominent posterior cervical fat pad \u2192 requires lipolysis, not Botox). Rounded shoulders\/forward posture (postural issue \u2192 requires physiotherapy, not Botox). Rappoel's in-person assessment can accurately determine your type and the appropriate treatment plan.\"}}]}<\/script><\/p>\n<style>\n*{box-sizing:border-box;margin:0;padding:0}\nbody{font-family:'PingFang SC','Noto Sans KR',sans-serif;background:#fffcf7;color:#3d2e1e;line-height:1.8}\n.wrap{max-width:677px;margin:0 auto;padding:32px 20px 60px}\n.banner{background:#FFF8EC;text-align:center;padding:36px 20px 28px;margin-bottom:36px;border-bottom:1px solid #e8d5c0}\n.banner-tag{font-size:11px;letter-spacing:3px;color:#8B7355;text-transform:uppercase;margin-bottom:12px}\n.banner h1{font-size:24px;color:#3d2e1e;line-height:1.4;margin-bottom:12px}\n.banner .sub{font-size:13px;color:#6b5240;line-height:1.7}\nh2{font-size:19px;color:#3d2e1e;margin:32px 0 14px;padding-bottom:8px;border-bottom:1px solid #e8d5c0}\nh3{font-size:16px;color:#3d2e1e;margin:22px 0 10px}\np{font-size:15px;color:#555;line-height:1.9;margin-bottom:14px}\n.highlight{background:#fff;border:1px solid #f0e8dc;border-left:3px solid #D4A574;padding:16px 20px;margin:22px 0;border-radius:0 6px 6px 0}\n.highlight p{margin:0;font-size:14px;color:#6b5240}\n.card{background:#F5E6C8;border:1px solid #e8d5c0;border-radius:8px;padding:18px 22px;margin:16px 0}\n.card-title{font-size:13px;font-weight:700;color:#3d2e1e;margin-bottom:6px}\n.card p{font-size:14px;margin:0}\n.faq-item{margin:14px 0;border-bottom:1px solid #f0e8dc;padding-bottom:14px}\n.faq-q{font-weight:700;color:#3d2e1e;font-size:15px;margin-bottom:6px}\n.faq-a{font-size:14px;color:#555;line-height:1.8}\n.cta{background:#F5E6C8;text-align:center;padding:32px 20px;margin-top:40px;border-radius:8px}\n.cta h3{font-size:17px;color:#3d2e1e;margin-bottom:8px}\n.cta p{font-size:13px;color:#6b5240;margin-bottom:4px}\nimg{max-width:100%;height:auto;display:block;margin:20px auto;border-radius:6px}\nul,ol{padding-left:22px;margin-bottom:14px}\nli{font-size:15px;color:#555;line-height:1.9;margin-bottom:4px}\n.schema-block{display:none}\n@media(max-width:600px){.wrap{padding:20px 14px 40px}.banner h1{font-size:20px}}\n<\/style>\n<p><\/head><br \/>\n<body><\/p>\n<div class=\"wrap\">\n<div class=\"banner\">\n<div class=\"banner-tag\">Botox<\/div>\n<h1>Trapezius Botox (Shoulder Slimming) in Seoul: Coretox for Swan Neck and Elegant Shoulder Line at Rappoel Dermatology<\/h1>\n<div class=\"sub\">Overdeveloped trapezius making your neck look short and shoulders bulky? Rappoel Dermatology uses Coretox for precise trapezius reduction \u2014 3-4 weeks to sculpt a slender neckline and graceful shoulder contour, no surgery required<\/div>\n<\/p><\/div>\n<p>Trapezius hypertrophy is among the most common yet most overlooked postural aesthetic concerns for Asian women. An overdeveloped trapezius makes the neck appear short and thick, blurs the neck-shoulder transition, and widens the upper-body silhouette from behind \u2014 a phenomenon colloquially known in Korean as ‘watermelon shoulders’ (\uc218\ubc15\uc5b4\uae68). Trapezius hypertrophy stems from two primary causes: (1) Postural compensation \u2014 prolonged desk work and smartphone use (‘tech neck’), where every 1cm of forward head posture adds approximately 2.5kg of extra load on the upper trapezius to maintain cranial balance, chronically stimulating compensatory muscle hyperplasia. (2) Stress-induced overuse \u2014 habitual shoulder shrugging, heavy lifting, and incorrect gym form (excessive barbell shrugs, compensatory lateral raises) that over-recruit the trapezius. Rappoel Dermatology near Gangnam Station, Seoul, uses Korean-manufactured Coretox (botulinum toxin type A) precisely injected into the upper trapezius, reducing muscle volume through reversible neuromuscular blockade \u2014 no pills, no surgery, 28 days from watermelon shoulders to swan neck.<\/p>\n<h2>Coretox Trapezius Slimming Mechanism \u2014 More Than Just Dissolving Muscle<\/h2>\n<ul>\n<li><strong>Precision neuromuscular junction blockade:<\/strong> After injection, Coretox’s heavy chain binds to specific SV2 receptors on motor nerve terminal presynaptic membranes, the light chain enters the cytoplasm and cleaves SNAP-25 protein, preventing acetylcholine-containing vesicles from fusing with the presynaptic membrane \u2014 nerve impulses cannot reach muscle fibers, and the muscle enters a state of functional dormancy<\/li>\n<li><strong>Selective atrophy (upper trapezius only):<\/strong> Rappoel’s injection protocol is precisely confined to the upper trapezius \u2014 the culprit behind the rounded, bulky shoulder appearance. The middle and lower trapezius (maintaining scapular stability and shoulder joint function), as well as the deeper levator scapulae and rhomboids (core postural muscles of the neck), are deliberately spared<\/li>\n<li><strong>Function-preserving design:<\/strong> The upper trapezius contributes approximately 30% of shoulder-shrugging strength \u2014 when suppressed by Coretox, this function is compensated by the middle and lower trapezius; daily activities (carrying bags, getting dressed, brushing hair) remain unaffected. Only the shoulder shrug motion shows mildly reduced force \u2014 but the upper trapezius itself is essentially an aesthetic rather than functionally essential muscle<\/li>\n<li><strong>Gradual volumetric reduction:<\/strong> After losing neural input, the muscle enters disuse atrophy \u2014 myofibril count remains unchanged, but individual fiber diameter shrinks, sarcoplasmic reticulum and glycogen stores decrease, and overall muscle volume reduces by approximately 20-40% over 4-8 weeks. The atrophy is uniform (multi-point injection strategy) \u2014 no focal depressions occur<\/li>\n<\/ul>\n<h2>Rappoel Coretox Trapezius Slimming Advantages<\/h2>\n<ul>\n<li><strong>High-purity Korean Coretox:<\/strong> Triple-chromatography purification yields ultra-low impurity protein content, drastically reducing antibody-formation (immunogenicity) risk \u2014 trapezius treatments require high doses (100-150 units per side), making purity critical<\/li>\n<li><strong>Ultrasound-guided injection:<\/strong> The physician uses musculoskeletal ultrasound for real-time needle-tip visualization, confirming exact upper trapezius muscle belly depth (approximately 1.5-2.5cm below the superficial fascia) \u2014 avoiding superficial injection (subcutaneous fat \u2014 ineffective) and overly deep injection (levator scapulae \u2014 unwanted functional muscle involvement)<\/li>\n<li><strong>Multi-point uniform distribution:<\/strong> 15-25 injection points per trapezius, 4-6 units each, evenly distributed along a crescent-shaped zone from above the lateral third of the clavicle to the acromion line \u2014 ensuring synchronous uniform atrophy across the entire muscle region<\/li>\n<li><strong>Symmetry precision:<\/strong> Most individuals already have 5-10% bilateral trapezius volume asymmetry (dominant-hand side slightly larger); Rappoel measures the difference through pre-injection postural assessment and adjusts dosing \u2014 the dominant side receives 5-10 additional units, achieving bilateral symmetry post-treatment<\/li>\n<li><strong>Postural rehabilitation synergy:<\/strong> After trapezius atrophy, cervical hypertonicity is relieved \u2014 many clients report unexpected improvement in long-standing neck and shoulder stiffness and soreness 2-3 weeks post-injection, as this was fundamentally caused by chronic muscle tension and spasm<\/li>\n<\/ul>\n<h2>Rappoel Coretox Trapezius Slimming Protocol<\/h2>\n<ol>\n<li><strong>Neck-shoulder postural assessment (10 min):<\/strong> Standing before a postural assessment grid \u2014 baseline photography from frontal, lateral, and posterior views \u2192 bilateral trapezius volume, cervico-shoulder angle, and clavicle exposure measured \u2192 per-side dosing plan formulated<\/li>\n<li><strong>Ultrasound injection mapping (5 min):<\/strong> Musculoskeletal ultrasound probe scanning upper trapezius from lateral clavicle third to acromion line \u2192 muscle belly contour marked on skin \u2192 15-25 injection points marked per side<\/li>\n<li><strong>Disinfection and Coretox multi-point injection (10-15 min):<\/strong> Povidone-iodine preparation of shoulder and neck skin \u2192 30G ultra-fine needle for injection at marked points, 4-6 units Coretox each, needle tip precisely at muscle belly depth (verified by ultrasound)<\/li>\n<li><strong>Compression and observation (5 min):<\/strong> Cotton swab compression 15 seconds per point for hemostasis \u2192 client instructed to keep shoulders still for 5 minutes for uniform toxin diffusion within muscle<\/li>\n<li><strong>Aftercare instruction and photography (5 min):<\/strong> No massage or heavy pressure on shoulders for 24 hours, no upper-body strength training for 3 days, immediate post-treatment baseline photography \u2192 4-week follow-up appointment for result assessment<\/li>\n<\/ol>\n<p>Coretox trapezius slimming is one of Rappoel’s most popular summer treatments \u2014 if you’re planning elegant off-shoulder looks for a wedding, graduation photos, or beach vacation, schedule your treatment 2-3 months ahead for optimal atrophy by the big day. Located a 3-minute walk from Gangnam Station Exit 10, with seamless English and Chinese consultation.<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<div class=\"faq-item\">\n<div class=\"faq-q\">How is trapezius Botox different from calf Botox?<\/div>\n<div class=\"faq-a\">Different target muscles and dosing: (1) Target \u2014 trapezius Botox treats the upper trapezius (the most superficial neck-shoulder muscle); calf Botox treats the gastrocnemius (the superficial posterior calf muscle). (2) Dosing \u2014 trapezius: 100-150 units Coretox per side (200-300 total); calves: 50-80 units Coretox per side (100-160 total). Why the higher dose for shoulders? The upper trapezius belly is substantially larger than the gastrocnemius; 50 units per side simply cannot cover sufficient muscle fibers. Both can be performed on the same day (no drug interaction, different target regions), but combining shoulders + calves + face on the same day is not recommended \u2014 cumulative dosing may approach the clinical single-session safety ceiling (conservatively recommended under 500 units total).<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">How much can trapezius Botox slim? When will I see results?<\/div>\n<div class=\"faq-a\">First-session results at 3-4 months: trapezius volume reduction approximately 20-40% (individual variation), with corresponding visual changes \u2014 neck appears approximately 1-2cm longer (as the cervical length previously buried under trapezius bulk is re-exposed), clavicles appear more prominent with enhanced horizontal visual extension, the lateral clavicle third transforms from a rounded muscular covering to a sharp bony contour, and shoulder lines in tank tops and off-shoulder styles shift from thick and round to flat and elegant. Timeline: Week 1 \u2014 no visible change (botulinum toxin requires 5-7 days for complete SNAP-25 cleavage). Week 3 \u2014 palpating the shoulders, the trapezius feels softer, without the previous hard bulk. Week 4 \u2014 shoulder appearance begins changing; neckline-collar junction looks cleaner in T-shirts. Weeks 8-10 \u2014 results become obvious; friends may ask if you’ve lost weight. Weeks 12-14 \u2014 peak result, shoulder contour at its most elegant. Thereafter, gradual recovery to approximately 70-80% of pre-treatment volume at 6-8 months, when a second touch-up is considered.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Is Coretox trapezius slimming safe? Will it affect my daily activities?<\/div>\n<div class=\"faq-a\">Very safe \u2014 the protocol is specifically designed for function preservation, targeting only the upper trapezius while sparing the middle and lower trapezius. Post-treatment activity assessment: carrying bags\/ luggage \u2014 unaffected (middle and lower trapezius compensates). Getting dressed and brushing hair \u2014 unaffected. Driving \u2014 unaffected. Typing and desk work \u2014 unaffected. Overhead arm reach \u2014 normal. Shoulder shrug \u2014 mildly reduced force sensation but not absent. The only transient change: approximately 10-15% of clients report mild shoulder soreness 2-3 days post-injection (similar to a stiff neck), which self-resolves \u2014 this is a normal response to needle trauma, not an adverse toxin reaction. Contraindications: no massage or heavy shoulder pressure for 24 hours; no upper-body strength training for 3 days.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">How long does one trapezius Botox session last? Is there dependency with repeated treatments?<\/div>\n<div class=\"faq-a\">First session lasts 6-8 months. Good news: as with calf and jaw Botox, trapezius slimming exhibits a cumulative effect \u2014 after the first atrophy cycle, even as the toxin metabolizes, the muscle does not fully return to its original volume because: (1) vascular and neural re-innervation after a 6-month dormant period is less complete than the original. (2) Behavioral adaptation \u2014 after slimming, the trapezius is no longer your default recruitment muscle. Actual data: first session \u2014 6-8 months; second touch-up \u2014 8-10 months; third and beyond \u2014 10-14 months or more. There is no physiological dependency \u2014 botulinum toxin is not a hormone; it doesn’t create escalating need. Any perceived dependency is purely psychological \u2014 once you’ve experienced elegant shoulder lines, returning to the original state feels insufficient. This psychological ‘preference’ and pharmacological dependency are fundamentally different concepts.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Who is a good candidate for trapezius Botox? How do I self-assess?<\/div>\n<div class=\"faq-a\">Quick self-assessment: wear a tank top and stand before a mirror \u2014 if the top of your shoulders (upper trapezius zone) presents as a triangular thickening \u2192 trapezius hypertrophy, suitable for slimming. Self-test: place your hands naturally atop the trapezius muscles on either side of your neck \u2192 forcefully shrug your shoulders \u2192 if the muscle mass you feel is large and hard, and retains some volume even at rest \u2192 suitable for trapezius Botox. Important differentials: simple broad shoulders (large skeletal frame \u2192 Botox ineffective). Dowager’s hump (prominent posterior cervical fat pad \u2192 requires lipolysis, not Botox). Rounded shoulders\/forward posture (postural issue \u2192 requires physiotherapy, not Botox). Rappoel’s in-person assessment can accurately determine your type and the appropriate treatment plan.<\/div>\n<\/div>\n<div class=\"cta\">\n<h3>Overdeveloped trapezius, heavy neck-shoulder silhouette, vanished collarbones? Rappoel Coretox trapezius slimming \u2014 28 days to reshape a slender, elegant swan neck and shoulder line!<\/h3>\n<p>\ud83d\udccd 77, Seocho-daero, Seocho-gu, Seoul, South Korea<\/p>\n<p>\ud83d\udd50 Mon\u2013Fri 10:00\u201319:00 \u00b7 Sat 10:00\u201317:00<\/p>\n<p>\ud83d\udcac WeChat Main: rappoelkr | WeChat Backup: rappoelkr2 | LINE: rappoelkr<\/p>\n<p style=\"margin-top:16px;font-size:13px;color:#8B7355;\">Scan to connect with us<\/p>\n<div style=\"display:flex;justify-content:center;gap:16px;flex-wrap:wrap;margin-top:10px;\">\n<div style=\"text-align:center;\">\n <img decoding=\"async\" src=\"https:\/\/rappoel-clinic.com\/wp-content\/uploads\/2026\/04\/Rappoel\u5fae\u4fe1\u4e8c\u7ef4\u7801\uff08\u4e3b\u53f7\uff09-1.png\" alt=\"WeChat Main QR Code\" style=\"width:120px;height:120px;border-radius:6px;\" \/><\/p>\n<p style=\"font-size:11px;color:#6b5240;margin-top:4px;\">WeChat (Main)<\/p>\n<\/p><\/div>\n<div style=\"text-align:center;\">\n <img decoding=\"async\" src=\"https:\/\/rappoel-clinic.com\/wp-content\/uploads\/2026\/04\/Rappoel\u5fae\u4fe1\u4e8c\u7ef4\u7801\uff08\u5907\u7528\u53f7\uff09-1.png\" alt=\"WeChat Backup QR Code\" style=\"width:120px;height:120px;border-radius:6px;\" \/><\/p>\n<p style=\"font-size:11px;color:#6b5240;margin-top:4px;\">WeChat (Backup)<\/p>\n<\/p><\/div>\n<div style=\"text-align:center;\">\n <img decoding=\"async\" src=\"https:\/\/rappoel-clinic.com\/wp-content\/uploads\/2026\/04\/Line\u4e8c\u7ef4\u7801-1.jpg\" alt=\"LINE QR Code\" style=\"width:120px;height:120px;border-radius:6px;\" \/><\/p>\n<p style=\"font-size:11px;color:#6b5240;margin-top:4px;\">LINE<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n<\/div>\n<p><\/body><br \/>\n<\/html><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Overdeveloped trapezius making your neck look short and shoulders bulky? Rappoel Dermatology uses Coretox for precise trapezius reduction \u2014 3-4 weeks to sculpt a slender neckline and graceful shoulder contour, no surgery required<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[66],"tags":[],"class_list":["post-1576","post","type-post","status-publish","format-standard","hentry","category-botox-en"],"_links":{"self":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1576","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/comments?post=1576"}],"version-history":[{"count":1,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1576\/revisions"}],"predecessor-version":[{"id":1580,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1576\/revisions\/1580"}],"wp:attachment":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/media?parent=1576"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/categories?post=1576"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/tags?post=1576"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}