Coretox Masseter Reduction in Seoul: Non-Surgical V-Line Jaw Slimming at Rappoel Clinic<\/title><br \/>\n<meta name=\"description\" content=\"Why do Korean women have such refined jawlines? It is not just genetics \u2014 Coretox, Korea's 4th-generation botulinum toxin, is the key to masseter reduction\">\n<link rel=\"alternate\" hreflang=\"en\" href=\"https:\/\/rappoel-clinic.com\/coretox-masseter-reduction-en\/\" \/>\n<link rel=\"alternate\" hreflang=\"zh-TW\" href=\"https:\/\/rappoel-clinic.com\/coretox-masseter-reduction-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\": \"Coretox Masseter Reduction in Seoul: Non-Surgical V-Line Jaw Slimming at Rappoel Clinic\", \"description\": \"Why do Korean women have such refined jawlines? It is not just genetics \u2014 Coretox, Korea's 4th-generation botulinum toxin, is the key to masseter reduction\", \"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\": \"What is the difference between Coretox and Botox for masseter reduction?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Coretox is Korea's 4th-generation botulinum toxin developed by Hugel, with higher purity and lower protein content, making it less likely to cause antibody resistance. Clinical results are comparable, but Coretox's greater molecular stability is advantageous for large muscle groups like the masseter.\"}}, {\"@type\": \"Question\", \"name\": \"How soon will I see a V-line after masseter injection?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Effects begin at 2-4 weeks, with cheeks gradually narrowing. Peak results are seen at 3 months. Results last 4-6 months; regular maintenance sessions help the muscle volume continue decreasing over time.\"}}, {\"@type\": \"Question\", \"name\": \"Will I have trouble chewing after the injection?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"No difficulty chewing \u2014 you can eat normally. A small number of patients may feel slight masseter weakness when chewing very hard foods for the first few days, but this does not affect daily eating. Avoid extremely hard foods like beef jerky or nuts for 48 hours.\"}}, {\"@type\": \"Question\", \"name\": \"Can you adjust only one side for facial asymmetry?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"If asymmetry is due to uneven masseter hypertrophy, a stronger dose can target the larger side to gradually correct the imbalance. If skeletal asymmetry is also present, the doctor will advise during the pre-treatment assessment whether complementary treatments are needed.\"}}, {\"@type\": \"Question\", \"name\": \"Can I fly home immediately after the injection?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Masseter injection leaves no wound and requires no downtime. Avoid pressing the face for 4 hours post-treatment, then you can travel or fly normally. Korea is a top destination for international patients seeking aesthetic treatments.\"}}]}<\/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, masseter reduction, jaw slimming, Coretox Seoul<\/div>\n<h1>Coretox Masseter Reduction in Seoul: Non-Surgical V-Line Jaw Slimming at Rappoel Clinic<\/h1>\n<div class=\"sub\">Why do Korean women have such refined jawlines? It is not just genetics \u2014 Coretox, Korea’s 4th-generation botulinum toxin, is the key to masseter reduction<\/div>\n<\/p><\/div>\n<p>A square or overly broad jawline, commonly called a ‘square face’, is a concern for many Asian individuals, especially noticeable in photographs. The cause is often not skeletal but rather hypertrophied masseter muscles \u2014 the chewing muscles that overdevelop from habits like chewing hard foods, teeth grinding (bruxism), or stress-related clenching. Coretox, developed by Korea’s Hugel Pharmaceuticals, is a fourth-generation botulinum toxin with high purity and stable molecular structure, particularly suited for large muscle group injections like the masseter. Rappoel Clinic in Seoul offers precise Coretox masseter reduction treatments \u2014 achieving a refined V-line without bone-shaving surgery.<\/p>\n<h2>How Coretox Masseter Injection Works<\/h2>\n<ul>\n<li><strong>Mechanism:<\/strong> Coretox injected into the masseter blocks nerve signal transmission, causing the muscle to gradually relax and atrophy from within, reducing muscle volume<\/li>\n<li><strong>Results Timeline:<\/strong> Effects begin appearing 2-4 weeks after injection, with cheeks gradually narrowing; peak results at 3 months, with a visibly slimmer V-line<\/li>\n<li><strong>Duration:<\/strong> Typically 4-6 months; a follow-up session at 3-4 months is recommended for first-time patients to prolong and optimize results<\/li>\n<li><strong>Added Benefit:<\/strong> Relaxed masseter muscles also significantly reduce nighttime teeth grinding, alleviating grinding-related headaches, jaw soreness, and dental wear<\/li>\n<\/ul>\n<h2>Rappoel’s Coretox Masseter Injection Procedure<\/h2>\n<ol>\n<li><strong>Pre-Treatment Assessment:<\/strong> The doctor palpates masseter thickness, evaluates asymmetry, inquires about chewing habits and bruxism, and designs a personalized dosing plan<\/li>\n<li><strong>Marking and Injection:<\/strong> Precise marking of injection points avoiding blood vessels and the parotid gland; rapid injection with a fine needle; total procedure time approximately 10-15 minutes<\/li>\n<li><strong>Post-Treatment Care:<\/strong> Avoid pressing the injection area, sleeping face-down, or facial massage for 4 hours; normal diet is fine but avoid excessively hard foods for 48 hours<\/li>\n<\/ol>\n<h2>Ideal Candidates<\/h2>\n<ul>\n<li>Noticeably enlarged masseter muscles; square or overly wide face shape<\/li>\n<li>Visible muscle bulging at both cheeks when clenching teeth<\/li>\n<li>Nighttime teeth grinding habits; morning jaw soreness<\/li>\n<li>Facial asymmetry \u2014 stronger dose can target the larger side to gradually correct imbalance<\/li>\n<li>Seeking non-surgical facial contouring, avoiding the recovery time and risks of bone-shaving surgery<\/li>\n<\/ul>\n<p>Rappoel Clinic, located in Seoul’s Gangnam district, has board-certified dermatologists with deep expertise in Asian facial muscle anatomy. Each Coretox dosage and injection placement is customized to the patient’s masseter distribution and facial contour goals, ensuring natural-looking slimming and proper handling of any asymmetry.<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<div class=\"faq-item\">\n<div class=\"faq-q\">What is the difference between Coretox and Botox for masseter reduction?<\/div>\n<div class=\"faq-a\">Coretox is Korea’s 4th-generation botulinum toxin developed by Hugel, with higher purity and lower protein content, making it less likely to cause antibody resistance. Clinical results are comparable, but Coretox’s greater molecular stability is advantageous for large muscle groups like the masseter.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">How soon will I see a V-line after masseter injection?<\/div>\n<div class=\"faq-a\">Effects begin at 2-4 weeks, with cheeks gradually narrowing. Peak results are seen at 3 months. Results last 4-6 months; regular maintenance sessions help the muscle volume continue decreasing over time.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Will I have trouble chewing after the injection?<\/div>\n<div class=\"faq-a\">No difficulty chewing \u2014 you can eat normally. A small number of patients may feel slight masseter weakness when chewing very hard foods for the first few days, but this does not affect daily eating. Avoid extremely hard foods like beef jerky or nuts for 48 hours.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Can you adjust only one side for facial asymmetry?<\/div>\n<div class=\"faq-a\">If asymmetry is due to uneven masseter hypertrophy, a stronger dose can target the larger side to gradually correct the imbalance. If skeletal asymmetry is also present, the doctor will advise during the pre-treatment assessment whether complementary treatments are needed.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Can I fly home immediately after the injection?<\/div>\n<div class=\"faq-a\">Masseter injection leaves no wound and requires no downtime. Avoid pressing the face for 4 hours post-treatment, then you can travel or fly normally. Korea is a top destination for international patients seeking aesthetic treatments.<\/div>\n<\/div>\n<div class=\"cta\">\n<h3>Ready to say goodbye to a square jaw and achieve a refined V-line? Contact Rappoel Clinic Seoul<\/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>Why do Korean women have such refined jawlines? It is not just genetics \u2014 Coretox, Korea’s 4th-generation botulinum toxin, is the key to masseter reduction<\/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-1309","post","type-post","status-publish","format-standard","hentry","category-botox-en"],"_links":{"self":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1309","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=1309"}],"version-history":[{"count":1,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1309\/revisions"}],"predecessor-version":[{"id":1311,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1309\/revisions\/1311"}],"wp:attachment":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/media?parent=1309"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/categories?post=1309"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/tags?post=1309"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":1309,"date":"2026-06-15T11:05:28","date_gmt":"2026-06-15T02:05:28","guid":{"rendered":"https:\/\/rappoel-clinic.com\/coretox-masseter-reduction-en\/"},"modified":"2026-06-15T11:05:31","modified_gmt":"2026-06-15T02:05:31","slug":"coretox-masseter-reduction-en","status":"publish","type":"post","link":"https:\/\/rappoel-clinic.com\/en\/coretox-masseter-reduction-en\/","title":{"rendered":"Coretox Masseter Reduction in Seoul: Non-Surgical V-Line Jaw Slimming at Rappoel Clinic"},"content":{"rendered":"

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\nCoretox Masseter Reduction in Seoul: Non-Surgical V-Line Jaw Slimming at Rappoel Clinic<\/title><br \/>\n<meta name=\"description\" content=\"Why do Korean women have such refined jawlines? It is not just genetics \u2014 Coretox, Korea's 4th-generation botulinum toxin, is the key to masseter reduction\">\n<link rel=\"alternate\" hreflang=\"en\" href=\"https:\/\/rappoel-clinic.com\/coretox-masseter-reduction-en\/\" \/>\n<link rel=\"alternate\" hreflang=\"zh-TW\" href=\"https:\/\/rappoel-clinic.com\/coretox-masseter-reduction-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\": \"Coretox Masseter Reduction in Seoul: Non-Surgical V-Line Jaw Slimming at Rappoel Clinic\", \"description\": \"Why do Korean women have such refined jawlines? It is not just genetics \u2014 Coretox, Korea's 4th-generation botulinum toxin, is the key to masseter reduction\", \"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\": \"What is the difference between Coretox and Botox for masseter reduction?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Coretox is Korea's 4th-generation botulinum toxin developed by Hugel, with higher purity and lower protein content, making it less likely to cause antibody resistance. 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Avoid extremely hard foods like beef jerky or nuts for 48 hours.\"}}, {\"@type\": \"Question\", \"name\": \"Can you adjust only one side for facial asymmetry?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"If asymmetry is due to uneven masseter hypertrophy, a stronger dose can target the larger side to gradually correct the imbalance. If skeletal asymmetry is also present, the doctor will advise during the pre-treatment assessment whether complementary treatments are needed.\"}}, {\"@type\": \"Question\", \"name\": \"Can I fly home immediately after the injection?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Masseter injection leaves no wound and requires no downtime. Avoid pressing the face for 4 hours post-treatment, then you can travel or fly normally. Korea is a top destination for international patients seeking aesthetic treatments.\"}}]}<\/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, masseter reduction, jaw slimming, Coretox Seoul<\/div>\n<h1>Coretox Masseter Reduction in Seoul: Non-Surgical V-Line Jaw Slimming at Rappoel Clinic<\/h1>\n<div class=\"sub\">Why do Korean women have such refined jawlines? It is not just genetics \u2014 Coretox, Korea’s 4th-generation botulinum toxin, is the key to masseter reduction<\/div>\n<\/p><\/div>\n<p>A square or overly broad jawline, commonly called a ‘square face’, is a concern for many Asian individuals, especially noticeable in photographs. The cause is often not skeletal but rather hypertrophied masseter muscles \u2014 the chewing muscles that overdevelop from habits like chewing hard foods, teeth grinding (bruxism), or stress-related clenching. Coretox, developed by Korea’s Hugel Pharmaceuticals, is a fourth-generation botulinum toxin with high purity and stable molecular structure, particularly suited for large muscle group injections like the masseter. Rappoel Clinic in Seoul offers precise Coretox masseter reduction treatments \u2014 achieving a refined V-line without bone-shaving surgery.<\/p>\n<h2>How Coretox Masseter Injection Works<\/h2>\n<ul>\n<li><strong>Mechanism:<\/strong> Coretox injected into the masseter blocks nerve signal transmission, causing the muscle to gradually relax and atrophy from within, reducing muscle volume<\/li>\n<li><strong>Results Timeline:<\/strong> Effects begin appearing 2-4 weeks after injection, with cheeks gradually narrowing; peak results at 3 months, with a visibly slimmer V-line<\/li>\n<li><strong>Duration:<\/strong> Typically 4-6 months; a follow-up session at 3-4 months is recommended for first-time patients to prolong and optimize results<\/li>\n<li><strong>Added Benefit:<\/strong> Relaxed masseter muscles also significantly reduce nighttime teeth grinding, alleviating grinding-related headaches, jaw soreness, and dental wear<\/li>\n<\/ul>\n<h2>Rappoel’s Coretox Masseter Injection Procedure<\/h2>\n<ol>\n<li><strong>Pre-Treatment Assessment:<\/strong> The doctor palpates masseter thickness, evaluates asymmetry, inquires about chewing habits and bruxism, and designs a personalized dosing plan<\/li>\n<li><strong>Marking and Injection:<\/strong> Precise marking of injection points avoiding blood vessels and the parotid gland; rapid injection with a fine needle; total procedure time approximately 10-15 minutes<\/li>\n<li><strong>Post-Treatment Care:<\/strong> Avoid pressing the injection area, sleeping face-down, or facial massage for 4 hours; normal diet is fine but avoid excessively hard foods for 48 hours<\/li>\n<\/ol>\n<h2>Ideal Candidates<\/h2>\n<ul>\n<li>Noticeably enlarged masseter muscles; square or overly wide face shape<\/li>\n<li>Visible muscle bulging at both cheeks when clenching teeth<\/li>\n<li>Nighttime teeth grinding habits; morning jaw soreness<\/li>\n<li>Facial asymmetry \u2014 stronger dose can target the larger side to gradually correct imbalance<\/li>\n<li>Seeking non-surgical facial contouring, avoiding the recovery time and risks of bone-shaving surgery<\/li>\n<\/ul>\n<p>Rappoel Clinic, located in Seoul’s Gangnam district, has board-certified dermatologists with deep expertise in Asian facial muscle anatomy. Each Coretox dosage and injection placement is customized to the patient’s masseter distribution and facial contour goals, ensuring natural-looking slimming and proper handling of any asymmetry.<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<div class=\"faq-item\">\n<div class=\"faq-q\">What is the difference between Coretox and Botox for masseter reduction?<\/div>\n<div class=\"faq-a\">Coretox is Korea’s 4th-generation botulinum toxin developed by Hugel, with higher purity and lower protein content, making it less likely to cause antibody resistance. Clinical results are comparable, but Coretox’s greater molecular stability is advantageous for large muscle groups like the masseter.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">How soon will I see a V-line after masseter injection?<\/div>\n<div class=\"faq-a\">Effects begin at 2-4 weeks, with cheeks gradually narrowing. Peak results are seen at 3 months. Results last 4-6 months; regular maintenance sessions help the muscle volume continue decreasing over time.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Will I have trouble chewing after the injection?<\/div>\n<div class=\"faq-a\">No difficulty chewing \u2014 you can eat normally. A small number of patients may feel slight masseter weakness when chewing very hard foods for the first few days, but this does not affect daily eating. Avoid extremely hard foods like beef jerky or nuts for 48 hours.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Can you adjust only one side for facial asymmetry?<\/div>\n<div class=\"faq-a\">If asymmetry is due to uneven masseter hypertrophy, a stronger dose can target the larger side to gradually correct the imbalance. If skeletal asymmetry is also present, the doctor will advise during the pre-treatment assessment whether complementary treatments are needed.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Can I fly home immediately after the injection?<\/div>\n<div class=\"faq-a\">Masseter injection leaves no wound and requires no downtime. Avoid pressing the face for 4 hours post-treatment, then you can travel or fly normally. Korea is a top destination for international patients seeking aesthetic treatments.<\/div>\n<\/div>\n<div class=\"cta\">\n<h3>Ready to say goodbye to a square jaw and achieve a refined V-line? Contact Rappoel Clinic Seoul<\/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>Why do Korean women have such refined jawlines? It is not just genetics \u2014 Coretox, Korea’s 4th-generation botulinum toxin, is the key to masseter reduction<\/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-1309","post","type-post","status-publish","format-standard","hentry","category-botox-en"],"_links":{"self":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1309","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=1309"}],"version-history":[{"count":1,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1309\/revisions"}],"predecessor-version":[{"id":1311,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1309\/revisions\/1311"}],"wp:attachment":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/media?parent=1309"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/categories?post=1309"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/tags?post=1309"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}