Acne Scar Laser Treatment in Seoul: CO2 Fractional + Fraxel Dual-Layer Repair at Rappoel Dermatology Gangnam<\/title><br \/>\n<meta name=\"description\" content=\"Teenage acne pits still 'pitting' you a decade later? Rappoel Dermatology uses CO2 fractional laser combined with non-ablative Fraxel for dual-layer remodeling \u2014 ablating surface scar margins while deep collagen regeneration fills depressed scars for visibly smoother skin\">\n<link rel=\"alternate\" hreflang=\"en\" href=\"https:\/\/rappoel-clinic.com\/acne-scar-fractional-laser-en\/\" \/>\n<link rel=\"alternate\" hreflang=\"zh-TW\" href=\"https:\/\/rappoel-clinic.com\/acne-scar-fractional-laser-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\": \"Acne Scar Laser Treatment in Seoul: CO2 Fractional + Fraxel Dual-Layer Repair at Rappoel Dermatology Gangnam\", \"description\": \"Teenage acne pits still 'pitting' you a decade later? Rappoel Dermatology uses CO2 fractional laser combined with non-ablative Fraxel for dual-layer remodeling \u2014 ablating surface scar margins while deep collagen regeneration fills depressed scars for visibly smoother skin\", \"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 many fractional laser sessions? What percentage improvement can I expect?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Standard course: 4-6 sessions (CO2 and Fraxel alternating, 6-8 weeks apart), total duration ~8-12 months. Improvement depends on three factors: scar type (ice-pick is hardest \u2192 maximum 40-50% improvement; boxcar and rolling are easier \u2192 60-80% improvement), scar age (fresh scars 1-3 years have better collagen repair potential; scars older than 10 years improve more slowly but still show meaningful improvement), individual neocollagenesis capacity (younger skin > older skin; non-smokers > smokers). 'Perfectly smooth' is not a scientifically valid goal (deep dermal structural defects cannot 100% return to pre-damage state), but 'undetectable at social distance, fully concealable with makeup, feels smooth to touch' is achievable. Rappoel physicians use similar-case photos during the initial consultation to help establish realistic expectations.\"}}, {\"@type\": \"Question\", \"name\": \"How long is the CO2 fractional laser recovery period?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Because CO2 involves epidermal vaporization (full-thickness removal within micron-scale thermal columns), recovery is longer than Fraxel but shorter than traditional full-face ablative resurfacing. Recovery timeline: Day of treatment \u2014 full-face redness and warmth, resembling a severe sunburn, visible grid-like micro-crusts. Days 1-2 \u2014 swelling (periocular region worst), micro-crusts turn brown, tiny dots. Day 3 \u2014 swelling subsides, brown micro-crusts begin shedding; face feels like fine sandpaper when washing. Days 4-5 \u2014 most micro-crusts shed; skin appears tender pink \u2014 this is the most sun-protection-critical phase! Days 7-10 \u2014 pinkness fades; initial skin texture improvement apparent, but pore and texture refinement requires collagen neogenesis (1-3 months). Month 1 \u2014 visible smoothness improvement; true scar margin softening gradually manifests over months 2-4 as collagen synthesis progresses. Strict sun protection throughout this period is paramount.\"}}, {\"@type\": \"Question\", \"name\": \"CO2 fractional vs. Fraxel \u2014 how do I choose?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Selection criteria derive from specific scar characteristics: (1) Ice-pick and boxcar sharp deep pits \u2192 CO2 is essential. Ice-pick margins are too sharp; only ablative CO2 can 'blast away' these trench edges and remodel them. (2) Rolling and mild irregular unevenness \u2192 Fraxel is primary. Fraxel's deep thermal injury stimulates abundant dermal collagen to fill depressions while avoiding the epidermal ablation recovery period. (3) Mixed type (~80% of people have mixed scars) \u2192 alternating combination, which is Rappoel's recommended strategy. Simplified rule: deep pits with sharp margins \u2192 CO2; wavy surface undulation \u2192 Fraxel; both \u2192 alternate. Also consider personal recovery tolerance \u2014 CO2 requires 1 week recovery; Fraxel requires only 2-3 days of light peeling.\"}}, {\"@type\": \"Question\", \"name\": \"Can laser make acne scars worse (PIH \/ new depressions)?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Under professional physician operation, acne scar laser does not worsen \u2014 it only improves within safety margins. Two most-watched complications: (1) Post-inflammatory hyperpigmentation (PIH) \u2014 occurs in approximately 15-25% of Asian patients, typically appearing 2-4 weeks post-laser (treated areas darken). Rappoel minimizes PIH risk through four measures: conservative starting energy, avoidance of overlapping passes, pre-treatment topical hydroquinone or tranexamic acid to suppress melanocytes, and strict one-month post-treatment sun protection. Even if PIH occurs, the vast majority resolves spontaneously within 3-6 months; topical lightening agents accelerate recovery. (2) New depressions \u2014 theoretically, CO2 over-ablation could create new pits, but modern scanning fractional systems with MTZ micro-column arrays and normal skin bridging mechanisms have reduced this risk to nearly zero. Rappoel uses sub-ablative low-density mode, prioritizing safety.\"}}, {\"@type\": \"Question\", \"name\": \"Fractional laser vs. microneedling for acne scars \u2014 which is better?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Efficacy gradient: CO2 fractional > Fraxel > RF microneedling (e.g., Vivace) > traditional microneedling\/dermaroller > at-home dermaroller. Explanation: (1) CO2 \u2014 dual mechanism (ablative vaporization + deep thermal effect), deepest penetration and strongest collagen stimulation, suitable for moderate-to-severe scars \u2014 but longest recovery (1 week). (2) Fraxel \u2014 pure thermal, non-ablative; moderate depth and intensity; suitable for mild-to-moderate scars \u2014 short recovery (2-3 days). (3) RF microneedling \u2014 microneedle dermal penetration + needle-tip RF heating; moderate strength; advantage: color-blind (RF energy does not rely on melanin absorption, unlike light-based lasers) \u2014 suitable for mild scars and all skin types. (4) Traditional microneedling \u2014 purely physical puncture stimulation; limited collagen induction; suitable for very mild texture improvement and skincare product delivery enhancement. (5) At-home rollers \u2014 needle length insufficient to reach dermis; minimal effect. Rappoel matches optimal technology or combination to your scar type and severity during consultation.\"}}]}<\/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\">Laser<\/div>\n<h1>Acne Scar Laser Treatment in Seoul: CO2 Fractional + Fraxel Dual-Layer Repair at Rappoel Dermatology Gangnam<\/h1>\n<div class=\"sub\">Teenage acne pits still ‘pitting’ you a decade later? Rappoel Dermatology uses CO2 fractional laser combined with non-ablative Fraxel for dual-layer remodeling \u2014 ablating surface scar margins while deep collagen regeneration fills depressed scars for visibly smoother skin<\/div>\n<\/p><\/div>\n<p>Acne scars are among the most stubborn ‘skin memories’ carried from adolescence into adulthood. Unlike post-inflammatory erythema (red acne marks) that fades spontaneously over time, true atrophic acne scars \u2014 ice-pick, boxcar, and rolling types \u2014 are structural dermal and subcutaneous tissue defects formed when severe inflammation irreversibly destroys dermal collagen and subcutaneous fat. No skincare product or topical cream can fill these depressions. The only technology that delivers meaningful improvement is laser fractional resurfacing. Rappoel Dermatology near Gangnam Station, Seoul, combines CO2 fractional laser (ablative) with non-ablative Fraxel-type laser to create a synergistic dual-layer repair strategy \u2014 CO2 vaporizes the sharp, fibrotic scar margins, while Fraxel delivers deep thermal stimulation for fibroblast activation and neocollagenesis, transforming depressed scars from sharp pits into blurred, shallow depressions that approach the normal skin plane.<\/p>\n<h2>Four Types of Acne Scars \u2014 Not All Scars Are Treated the Same Way<\/h2>\n<ul>\n<li><strong>Ice-pick (60-70%):<\/strong> Diameter <2mm, depth >3mm; narrow, deep V-shaped depressions with sharp margins penetrating deep dermis \u2014 the deepest, most difficult type to treat. Cause: follicular infundibular necrosis and collapse<\/li>\n<li><strong>Boxcar (20-30%):<\/strong> Diameter 1.5-4mm; U-shaped or square-shaped depressions with steep vertical edges and flat bases \u2014 moderate-depth round or oval pits. Responds well to fractional laser<\/li>\n<li><strong>Rolling (15-25%):<\/strong> Diameter >4mm; continuous wavy undulating depressions without sharp borders \u2014 skin surface resembles orange peel texture. Cause: fibrotic bands tethering the dermis to subcutaneous tissue, pulling the epidermis downward<\/li>\n<li><strong>Hypertrophic\/Keloidal (minority):<\/strong> Excessive scar proliferation forming firm nodules above the skin plane, red or brown in color \u2014 not suitable for ablative laser; better treated with pulsed dye laser for vascular reduction + intralesional steroid injection<\/li>\n<\/ul>\n<h2>Rappoel’s Dual-Wavelength, Deep-Shallow Synergistic Scar System<\/h2>\n<ul>\n<li><strong>Layer 1 \u2014 CO2 fractional laser (Ablative):<\/strong> High-energy, small-spot CO2 laser creates Microscopic Treatment Zones (MTZs) \u2014 micron-scale columns where full-thickness epidermis and partial dermal scar tissue are vaporized. Functions: leveling sharp scar edges, breaking fibrotic adhesions, creating space for new collagen infill. Single-session coverage ~20-30% (remaining normal skin bridges serve as regeneration scaffolding); 6-8 week intervals, 3-5 sessions per course<\/li>\n<li><strong>Layer 2 \u2014 Fraxel laser (Non-Ablative):<\/strong> 1550nm or 1927nm erbium-fiber laser creates Microscopic Thermal Zones (MTZs) \u2014 deep thermal columns surrounded by healthy tissue rings without ablating the epidermis. While preserving epidermal integrity, thermal energy penetrates to the mid-dermis, stimulating gradual neocollagenesis. Fraxel recovery is shorter than CO2 (only 2-3 days of light peeling) and can be alternated with CO2 (CO2 session \u2192 6 weeks later Fraxel \u2192 6 weeks later CO2)<\/li>\n<li><strong>Synergistic advantages:<\/strong> Using either laser alone has limitations \u2014 post-CO2 skin shows improved evenness but pores may appear larger (regenerated epidermal texture can be rougher); post-Fraxel collagen improves texture but sharp scar margins remain largely unchanged. Combined treatment is complementary: CO2 deplanes sharp margins and ablates basal scar tissue + Fraxel pushes the depression upward from deep collagen regeneration \u2014 attacking from both directions<\/li>\n<li><strong>Subcision for rolling scars:<\/strong> For fibrotic band adhesions characteristic of rolling scars, subcision is performed prior to laser \u2014 Nokor needle or blunt cannula severs the fibrotic tethers pulling the epidermis downward, creating conditions for subsequent laser infill<\/li>\n<li><strong>Active post-laser repair support:<\/strong> The 1-2 weeks post-laser represent a high-intensity repair window \u2014 Rappoel recommends concurrent PRP (Platelet-Rich Plasma) or growth factor serums to accelerate epidermal regeneration and collagen maturation; the quality of this repair phase directly impacts final scar improvement<\/li>\n<li><strong>Asian PIH-safe parameters:<\/strong> Korean dermatologists calibrate CO2 energy to sub-ablative, low-density, close-contact mode specifically for Asian skin’s PIH tendency, minimizing post-inflammatory hyperpigmentation risk<\/li>\n<\/ul>\n<h2>Rappoel Acne Scar Treatment Protocol<\/h2>\n<ol>\n<li><strong>Initial scar classification and severity assessment (30 min):<\/strong> Under magnification and oblique lighting, the physician individually classifies each scar (ice-pick\/boxcar\/rolling\/mixed), documents density, depth, and distribution; baseline photography with VISIA texture analysis<\/li>\n<li><strong>Personalized combination plan design:<\/strong> Ice-pick dominant \u2192 CO2-primary + Fraxel support; boxcar \u2192 CO2 + Fraxel in alternating equal ratio; rolling \u2192 subcision + Fraxel-primary + CO2 edge refinement if needed<\/li>\n<li><strong>Laser treatment (30-45 min\/session):<\/strong> Topical anesthetic cream 40 min \u2192 full-face cleansing \u2192 CO2 (~20 min) or Fraxel (~15 min) per plan \u2192 post-treatment ice + repair mask<\/li>\n<li><strong>Interval treatment (6-8 weeks later):<\/strong> Typically Fraxel 6-8 weeks after first CO2, followed by second CO2 6-8 weeks later \u2014 rolling cycle totaling 4-6 sessions (~8-12 months for full course)<\/li>\n<li><strong>Endpoint assessment and maintenance:<\/strong> After 4-6 cycles \u2014 repeat VISIA + clinical photography comparison, evaluate percentage improvement in scar depth and skin texture recovery, determine whether 1-2 reinforcement sessions are needed or transition to maintenance<\/li>\n<\/ol>\n<p>Rappoel Dermatology emphasizes that acne scar treatment is a systematic process. A reasonable expectation is 50-80% reduction in scar depth (not 100% elimination \u2014 every individual’s scar collagen regeneration potential varies). Located a 3-minute walk from Gangnam Station Exit 10, with full English and Chinese consultation and board-certified Korean dermatologist assessment and operation.<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<div class=\"faq-item\">\n<div class=\"faq-q\">How many fractional laser sessions? What percentage improvement can I expect?<\/div>\n<div class=\"faq-a\">Standard course: 4-6 sessions (CO2 and Fraxel alternating, 6-8 weeks apart), total duration ~8-12 months. Improvement depends on three factors: scar type (ice-pick is hardest \u2192 maximum 40-50% improvement; boxcar and rolling are easier \u2192 60-80% improvement), scar age (fresh scars 1-3 years have better collagen repair potential; scars older than 10 years improve more slowly but still show meaningful improvement), individual neocollagenesis capacity (younger skin > older skin; non-smokers > smokers). ‘Perfectly smooth’ is not a scientifically valid goal (deep dermal structural defects cannot 100% return to pre-damage state), but ‘undetectable at social distance, fully concealable with makeup, feels smooth to touch’ is achievable. Rappoel physicians use similar-case photos during the initial consultation to help establish realistic expectations.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">How long is the CO2 fractional laser recovery period?<\/div>\n<div class=\"faq-a\">Because CO2 involves epidermal vaporization (full-thickness removal within micron-scale thermal columns), recovery is longer than Fraxel but shorter than traditional full-face ablative resurfacing. Recovery timeline: Day of treatment \u2014 full-face redness and warmth, resembling a severe sunburn, visible grid-like micro-crusts. Days 1-2 \u2014 swelling (periocular region worst), micro-crusts turn brown, tiny dots. Day 3 \u2014 swelling subsides, brown micro-crusts begin shedding; face feels like fine sandpaper when washing. Days 4-5 \u2014 most micro-crusts shed; skin appears tender pink \u2014 this is the most sun-protection-critical phase! Days 7-10 \u2014 pinkness fades; initial skin texture improvement apparent, but pore and texture refinement requires collagen neogenesis (1-3 months). Month 1 \u2014 visible smoothness improvement; true scar margin softening gradually manifests over months 2-4 as collagen synthesis progresses. Strict sun protection throughout this period is paramount.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">CO2 fractional vs. Fraxel \u2014 how do I choose?<\/div>\n<div class=\"faq-a\">Selection criteria derive from specific scar characteristics: (1) Ice-pick and boxcar sharp deep pits \u2192 CO2 is essential. Ice-pick margins are too sharp; only ablative CO2 can ‘blast away’ these trench edges and remodel them. (2) Rolling and mild irregular unevenness \u2192 Fraxel is primary. Fraxel’s deep thermal injury stimulates abundant dermal collagen to fill depressions while avoiding the epidermal ablation recovery period. (3) Mixed type (~80% of people have mixed scars) \u2192 alternating combination, which is Rappoel’s recommended strategy. Simplified rule: deep pits with sharp margins \u2192 CO2; wavy surface undulation \u2192 Fraxel; both \u2192 alternate. Also consider personal recovery tolerance \u2014 CO2 requires 1 week recovery; Fraxel requires only 2-3 days of light peeling.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Can laser make acne scars worse (PIH \/ new depressions)?<\/div>\n<div class=\"faq-a\">Under professional physician operation, acne scar laser does not worsen \u2014 it only improves within safety margins. Two most-watched complications: (1) Post-inflammatory hyperpigmentation (PIH) \u2014 occurs in approximately 15-25% of Asian patients, typically appearing 2-4 weeks post-laser (treated areas darken). Rappoel minimizes PIH risk through four measures: conservative starting energy, avoidance of overlapping passes, pre-treatment topical hydroquinone or tranexamic acid to suppress melanocytes, and strict one-month post-treatment sun protection. Even if PIH occurs, the vast majority resolves spontaneously within 3-6 months; topical lightening agents accelerate recovery. (2) New depressions \u2014 theoretically, CO2 over-ablation could create new pits, but modern scanning fractional systems with MTZ micro-column arrays and normal skin bridging mechanisms have reduced this risk to nearly zero. Rappoel uses sub-ablative low-density mode, prioritizing safety.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Fractional laser vs. microneedling for acne scars \u2014 which is better?<\/div>\n<div class=\"faq-a\">Efficacy gradient: CO2 fractional > Fraxel > RF microneedling (e.g., Vivace) > traditional microneedling\/dermaroller > at-home dermaroller. Explanation: (1) CO2 \u2014 dual mechanism (ablative vaporization + deep thermal effect), deepest penetration and strongest collagen stimulation, suitable for moderate-to-severe scars \u2014 but longest recovery (1 week). (2) Fraxel \u2014 pure thermal, non-ablative; moderate depth and intensity; suitable for mild-to-moderate scars \u2014 short recovery (2-3 days). (3) RF microneedling \u2014 microneedle dermal penetration + needle-tip RF heating; moderate strength; advantage: color-blind (RF energy does not rely on melanin absorption, unlike light-based lasers) \u2014 suitable for mild scars and all skin types. (4) Traditional microneedling \u2014 purely physical puncture stimulation; limited collagen induction; suitable for very mild texture improvement and skincare product delivery enhancement. (5) At-home rollers \u2014 needle length insufficient to reach dermis; minimal effect. Rappoel matches optimal technology or combination to your scar type and severity during consultation.<\/div>\n<\/div>\n<div class=\"cta\">\n<h3>Used countless serums but acne scars still deeply pitted? Rappoel fractional laser combination repair \u2014 rebuild smooth, youthful skin from deep within<\/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>Teenage acne pits still ‘pitting’ you a decade later? Rappoel Dermatology uses CO2 fractional laser combined with non-ablative Fraxel for dual-layer remodeling \u2014 ablating surface scar margins while deep collagen regeneration fills depressed scars for visibly smoother skin<\/p>","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[67],"tags":[],"class_list":["post-1558","post","type-post","status-publish","format-standard","hentry","category-laser-en"],"_links":{"self":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1558","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=1558"}],"version-history":[{"count":1,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1558\/revisions"}],"predecessor-version":[{"id":1560,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1558\/revisions\/1560"}],"wp:attachment":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/media?parent=1558"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/categories?post=1558"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/tags?post=1558"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":1558,"date":"2026-07-30T18:00:41","date_gmt":"2026-07-30T09:00:41","guid":{"rendered":"https:\/\/rappoel-clinic.com\/acne-scar-fractional-laser-en\/"},"modified":"2026-07-30T18:00:44","modified_gmt":"2026-07-30T09:00:44","slug":"acne-scar-fractional-laser-en","status":"publish","type":"post","link":"https:\/\/rappoel-clinic.com\/en\/acne-scar-fractional-laser-en\/","title":{"rendered":"Acne Scar Laser Treatment in Seoul: CO2 Fractional + Fraxel Dual-Layer Repair at Rappoel Dermatology Gangnam"},"content":{"rendered":"

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\nAcne Scar Laser Treatment in Seoul: CO2 Fractional + Fraxel Dual-Layer Repair at Rappoel Dermatology Gangnam<\/title><br \/>\n<meta name=\"description\" content=\"Teenage acne pits still 'pitting' you a decade later? Rappoel Dermatology uses CO2 fractional laser combined with non-ablative Fraxel for dual-layer remodeling \u2014 ablating surface scar margins while deep collagen regeneration fills depressed scars for visibly smoother skin\">\n<link rel=\"alternate\" hreflang=\"en\" href=\"https:\/\/rappoel-clinic.com\/acne-scar-fractional-laser-en\/\" \/>\n<link rel=\"alternate\" hreflang=\"zh-TW\" href=\"https:\/\/rappoel-clinic.com\/acne-scar-fractional-laser-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\": \"Acne Scar Laser Treatment in Seoul: CO2 Fractional + Fraxel Dual-Layer Repair at Rappoel Dermatology Gangnam\", \"description\": \"Teenage acne pits still 'pitting' you a decade later? Rappoel Dermatology uses CO2 fractional laser combined with non-ablative Fraxel for dual-layer remodeling \u2014 ablating surface scar margins while deep collagen regeneration fills depressed scars for visibly smoother skin\", \"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 many fractional laser sessions? What percentage improvement can I expect?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Standard course: 4-6 sessions (CO2 and Fraxel alternating, 6-8 weeks apart), total duration ~8-12 months. Improvement depends on three factors: scar type (ice-pick is hardest \u2192 maximum 40-50% improvement; boxcar and rolling are easier \u2192 60-80% improvement), scar age (fresh scars 1-3 years have better collagen repair potential; scars older than 10 years improve more slowly but still show meaningful improvement), individual neocollagenesis capacity (younger skin > older skin; non-smokers > smokers). 'Perfectly smooth' is not a scientifically valid goal (deep dermal structural defects cannot 100% return to pre-damage state), but 'undetectable at social distance, fully concealable with makeup, feels smooth to touch' is achievable. Rappoel physicians use similar-case photos during the initial consultation to help establish realistic expectations.\"}}, {\"@type\": \"Question\", \"name\": \"How long is the CO2 fractional laser recovery period?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Because CO2 involves epidermal vaporization (full-thickness removal within micron-scale thermal columns), recovery is longer than Fraxel but shorter than traditional full-face ablative resurfacing. Recovery timeline: Day of treatment \u2014 full-face redness and warmth, resembling a severe sunburn, visible grid-like micro-crusts. Days 1-2 \u2014 swelling (periocular region worst), micro-crusts turn brown, tiny dots. Day 3 \u2014 swelling subsides, brown micro-crusts begin shedding; face feels like fine sandpaper when washing. Days 4-5 \u2014 most micro-crusts shed; skin appears tender pink \u2014 this is the most sun-protection-critical phase! Days 7-10 \u2014 pinkness fades; initial skin texture improvement apparent, but pore and texture refinement requires collagen neogenesis (1-3 months). Month 1 \u2014 visible smoothness improvement; true scar margin softening gradually manifests over months 2-4 as collagen synthesis progresses. Strict sun protection throughout this period is paramount.\"}}, {\"@type\": \"Question\", \"name\": \"CO2 fractional vs. Fraxel \u2014 how do I choose?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Selection criteria derive from specific scar characteristics: (1) Ice-pick and boxcar sharp deep pits \u2192 CO2 is essential. Ice-pick margins are too sharp; only ablative CO2 can 'blast away' these trench edges and remodel them. (2) Rolling and mild irregular unevenness \u2192 Fraxel is primary. Fraxel's deep thermal injury stimulates abundant dermal collagen to fill depressions while avoiding the epidermal ablation recovery period. (3) Mixed type (~80% of people have mixed scars) \u2192 alternating combination, which is Rappoel's recommended strategy. Simplified rule: deep pits with sharp margins \u2192 CO2; wavy surface undulation \u2192 Fraxel; both \u2192 alternate. Also consider personal recovery tolerance \u2014 CO2 requires 1 week recovery; Fraxel requires only 2-3 days of light peeling.\"}}, {\"@type\": \"Question\", \"name\": \"Can laser make acne scars worse (PIH \/ new depressions)?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Under professional physician operation, acne scar laser does not worsen \u2014 it only improves within safety margins. Two most-watched complications: (1) Post-inflammatory hyperpigmentation (PIH) \u2014 occurs in approximately 15-25% of Asian patients, typically appearing 2-4 weeks post-laser (treated areas darken). Rappoel minimizes PIH risk through four measures: conservative starting energy, avoidance of overlapping passes, pre-treatment topical hydroquinone or tranexamic acid to suppress melanocytes, and strict one-month post-treatment sun protection. Even if PIH occurs, the vast majority resolves spontaneously within 3-6 months; topical lightening agents accelerate recovery. (2) New depressions \u2014 theoretically, CO2 over-ablation could create new pits, but modern scanning fractional systems with MTZ micro-column arrays and normal skin bridging mechanisms have reduced this risk to nearly zero. Rappoel uses sub-ablative low-density mode, prioritizing safety.\"}}, {\"@type\": \"Question\", \"name\": \"Fractional laser vs. microneedling for acne scars \u2014 which is better?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Efficacy gradient: CO2 fractional > Fraxel > RF microneedling (e.g., Vivace) > traditional microneedling\/dermaroller > at-home dermaroller. Explanation: (1) CO2 \u2014 dual mechanism (ablative vaporization + deep thermal effect), deepest penetration and strongest collagen stimulation, suitable for moderate-to-severe scars \u2014 but longest recovery (1 week). (2) Fraxel \u2014 pure thermal, non-ablative; moderate depth and intensity; suitable for mild-to-moderate scars \u2014 short recovery (2-3 days). (3) RF microneedling \u2014 microneedle dermal penetration + needle-tip RF heating; moderate strength; advantage: color-blind (RF energy does not rely on melanin absorption, unlike light-based lasers) \u2014 suitable for mild scars and all skin types. (4) Traditional microneedling \u2014 purely physical puncture stimulation; limited collagen induction; suitable for very mild texture improvement and skincare product delivery enhancement. (5) At-home rollers \u2014 needle length insufficient to reach dermis; minimal effect. Rappoel matches optimal technology or combination to your scar type and severity during consultation.\"}}]}<\/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\">Laser<\/div>\n<h1>Acne Scar Laser Treatment in Seoul: CO2 Fractional + Fraxel Dual-Layer Repair at Rappoel Dermatology Gangnam<\/h1>\n<div class=\"sub\">Teenage acne pits still ‘pitting’ you a decade later? Rappoel Dermatology uses CO2 fractional laser combined with non-ablative Fraxel for dual-layer remodeling \u2014 ablating surface scar margins while deep collagen regeneration fills depressed scars for visibly smoother skin<\/div>\n<\/p><\/div>\n<p>Acne scars are among the most stubborn ‘skin memories’ carried from adolescence into adulthood. Unlike post-inflammatory erythema (red acne marks) that fades spontaneously over time, true atrophic acne scars \u2014 ice-pick, boxcar, and rolling types \u2014 are structural dermal and subcutaneous tissue defects formed when severe inflammation irreversibly destroys dermal collagen and subcutaneous fat. No skincare product or topical cream can fill these depressions. The only technology that delivers meaningful improvement is laser fractional resurfacing. Rappoel Dermatology near Gangnam Station, Seoul, combines CO2 fractional laser (ablative) with non-ablative Fraxel-type laser to create a synergistic dual-layer repair strategy \u2014 CO2 vaporizes the sharp, fibrotic scar margins, while Fraxel delivers deep thermal stimulation for fibroblast activation and neocollagenesis, transforming depressed scars from sharp pits into blurred, shallow depressions that approach the normal skin plane.<\/p>\n<h2>Four Types of Acne Scars \u2014 Not All Scars Are Treated the Same Way<\/h2>\n<ul>\n<li><strong>Ice-pick (60-70%):<\/strong> Diameter <2mm, depth >3mm; narrow, deep V-shaped depressions with sharp margins penetrating deep dermis \u2014 the deepest, most difficult type to treat. Cause: follicular infundibular necrosis and collapse<\/li>\n<li><strong>Boxcar (20-30%):<\/strong> Diameter 1.5-4mm; U-shaped or square-shaped depressions with steep vertical edges and flat bases \u2014 moderate-depth round or oval pits. Responds well to fractional laser<\/li>\n<li><strong>Rolling (15-25%):<\/strong> Diameter >4mm; continuous wavy undulating depressions without sharp borders \u2014 skin surface resembles orange peel texture. Cause: fibrotic bands tethering the dermis to subcutaneous tissue, pulling the epidermis downward<\/li>\n<li><strong>Hypertrophic\/Keloidal (minority):<\/strong> Excessive scar proliferation forming firm nodules above the skin plane, red or brown in color \u2014 not suitable for ablative laser; better treated with pulsed dye laser for vascular reduction + intralesional steroid injection<\/li>\n<\/ul>\n<h2>Rappoel’s Dual-Wavelength, Deep-Shallow Synergistic Scar System<\/h2>\n<ul>\n<li><strong>Layer 1 \u2014 CO2 fractional laser (Ablative):<\/strong> High-energy, small-spot CO2 laser creates Microscopic Treatment Zones (MTZs) \u2014 micron-scale columns where full-thickness epidermis and partial dermal scar tissue are vaporized. Functions: leveling sharp scar edges, breaking fibrotic adhesions, creating space for new collagen infill. Single-session coverage ~20-30% (remaining normal skin bridges serve as regeneration scaffolding); 6-8 week intervals, 3-5 sessions per course<\/li>\n<li><strong>Layer 2 \u2014 Fraxel laser (Non-Ablative):<\/strong> 1550nm or 1927nm erbium-fiber laser creates Microscopic Thermal Zones (MTZs) \u2014 deep thermal columns surrounded by healthy tissue rings without ablating the epidermis. While preserving epidermal integrity, thermal energy penetrates to the mid-dermis, stimulating gradual neocollagenesis. Fraxel recovery is shorter than CO2 (only 2-3 days of light peeling) and can be alternated with CO2 (CO2 session \u2192 6 weeks later Fraxel \u2192 6 weeks later CO2)<\/li>\n<li><strong>Synergistic advantages:<\/strong> Using either laser alone has limitations \u2014 post-CO2 skin shows improved evenness but pores may appear larger (regenerated epidermal texture can be rougher); post-Fraxel collagen improves texture but sharp scar margins remain largely unchanged. Combined treatment is complementary: CO2 deplanes sharp margins and ablates basal scar tissue + Fraxel pushes the depression upward from deep collagen regeneration \u2014 attacking from both directions<\/li>\n<li><strong>Subcision for rolling scars:<\/strong> For fibrotic band adhesions characteristic of rolling scars, subcision is performed prior to laser \u2014 Nokor needle or blunt cannula severs the fibrotic tethers pulling the epidermis downward, creating conditions for subsequent laser infill<\/li>\n<li><strong>Active post-laser repair support:<\/strong> The 1-2 weeks post-laser represent a high-intensity repair window \u2014 Rappoel recommends concurrent PRP (Platelet-Rich Plasma) or growth factor serums to accelerate epidermal regeneration and collagen maturation; the quality of this repair phase directly impacts final scar improvement<\/li>\n<li><strong>Asian PIH-safe parameters:<\/strong> Korean dermatologists calibrate CO2 energy to sub-ablative, low-density, close-contact mode specifically for Asian skin’s PIH tendency, minimizing post-inflammatory hyperpigmentation risk<\/li>\n<\/ul>\n<h2>Rappoel Acne Scar Treatment Protocol<\/h2>\n<ol>\n<li><strong>Initial scar classification and severity assessment (30 min):<\/strong> Under magnification and oblique lighting, the physician individually classifies each scar (ice-pick\/boxcar\/rolling\/mixed), documents density, depth, and distribution; baseline photography with VISIA texture analysis<\/li>\n<li><strong>Personalized combination plan design:<\/strong> Ice-pick dominant \u2192 CO2-primary + Fraxel support; boxcar \u2192 CO2 + Fraxel in alternating equal ratio; rolling \u2192 subcision + Fraxel-primary + CO2 edge refinement if needed<\/li>\n<li><strong>Laser treatment (30-45 min\/session):<\/strong> Topical anesthetic cream 40 min \u2192 full-face cleansing \u2192 CO2 (~20 min) or Fraxel (~15 min) per plan \u2192 post-treatment ice + repair mask<\/li>\n<li><strong>Interval treatment (6-8 weeks later):<\/strong> Typically Fraxel 6-8 weeks after first CO2, followed by second CO2 6-8 weeks later \u2014 rolling cycle totaling 4-6 sessions (~8-12 months for full course)<\/li>\n<li><strong>Endpoint assessment and maintenance:<\/strong> After 4-6 cycles \u2014 repeat VISIA + clinical photography comparison, evaluate percentage improvement in scar depth and skin texture recovery, determine whether 1-2 reinforcement sessions are needed or transition to maintenance<\/li>\n<\/ol>\n<p>Rappoel Dermatology emphasizes that acne scar treatment is a systematic process. A reasonable expectation is 50-80% reduction in scar depth (not 100% elimination \u2014 every individual’s scar collagen regeneration potential varies). Located a 3-minute walk from Gangnam Station Exit 10, with full English and Chinese consultation and board-certified Korean dermatologist assessment and operation.<\/p>\n<h2>Frequently Asked Questions<\/h2>\n<div class=\"faq-item\">\n<div class=\"faq-q\">How many fractional laser sessions? What percentage improvement can I expect?<\/div>\n<div class=\"faq-a\">Standard course: 4-6 sessions (CO2 and Fraxel alternating, 6-8 weeks apart), total duration ~8-12 months. Improvement depends on three factors: scar type (ice-pick is hardest \u2192 maximum 40-50% improvement; boxcar and rolling are easier \u2192 60-80% improvement), scar age (fresh scars 1-3 years have better collagen repair potential; scars older than 10 years improve more slowly but still show meaningful improvement), individual neocollagenesis capacity (younger skin > older skin; non-smokers > smokers). ‘Perfectly smooth’ is not a scientifically valid goal (deep dermal structural defects cannot 100% return to pre-damage state), but ‘undetectable at social distance, fully concealable with makeup, feels smooth to touch’ is achievable. Rappoel physicians use similar-case photos during the initial consultation to help establish realistic expectations.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">How long is the CO2 fractional laser recovery period?<\/div>\n<div class=\"faq-a\">Because CO2 involves epidermal vaporization (full-thickness removal within micron-scale thermal columns), recovery is longer than Fraxel but shorter than traditional full-face ablative resurfacing. Recovery timeline: Day of treatment \u2014 full-face redness and warmth, resembling a severe sunburn, visible grid-like micro-crusts. Days 1-2 \u2014 swelling (periocular region worst), micro-crusts turn brown, tiny dots. Day 3 \u2014 swelling subsides, brown micro-crusts begin shedding; face feels like fine sandpaper when washing. Days 4-5 \u2014 most micro-crusts shed; skin appears tender pink \u2014 this is the most sun-protection-critical phase! Days 7-10 \u2014 pinkness fades; initial skin texture improvement apparent, but pore and texture refinement requires collagen neogenesis (1-3 months). Month 1 \u2014 visible smoothness improvement; true scar margin softening gradually manifests over months 2-4 as collagen synthesis progresses. Strict sun protection throughout this period is paramount.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">CO2 fractional vs. Fraxel \u2014 how do I choose?<\/div>\n<div class=\"faq-a\">Selection criteria derive from specific scar characteristics: (1) Ice-pick and boxcar sharp deep pits \u2192 CO2 is essential. Ice-pick margins are too sharp; only ablative CO2 can ‘blast away’ these trench edges and remodel them. (2) Rolling and mild irregular unevenness \u2192 Fraxel is primary. Fraxel’s deep thermal injury stimulates abundant dermal collagen to fill depressions while avoiding the epidermal ablation recovery period. (3) Mixed type (~80% of people have mixed scars) \u2192 alternating combination, which is Rappoel’s recommended strategy. Simplified rule: deep pits with sharp margins \u2192 CO2; wavy surface undulation \u2192 Fraxel; both \u2192 alternate. Also consider personal recovery tolerance \u2014 CO2 requires 1 week recovery; Fraxel requires only 2-3 days of light peeling.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Can laser make acne scars worse (PIH \/ new depressions)?<\/div>\n<div class=\"faq-a\">Under professional physician operation, acne scar laser does not worsen \u2014 it only improves within safety margins. Two most-watched complications: (1) Post-inflammatory hyperpigmentation (PIH) \u2014 occurs in approximately 15-25% of Asian patients, typically appearing 2-4 weeks post-laser (treated areas darken). Rappoel minimizes PIH risk through four measures: conservative starting energy, avoidance of overlapping passes, pre-treatment topical hydroquinone or tranexamic acid to suppress melanocytes, and strict one-month post-treatment sun protection. Even if PIH occurs, the vast majority resolves spontaneously within 3-6 months; topical lightening agents accelerate recovery. (2) New depressions \u2014 theoretically, CO2 over-ablation could create new pits, but modern scanning fractional systems with MTZ micro-column arrays and normal skin bridging mechanisms have reduced this risk to nearly zero. Rappoel uses sub-ablative low-density mode, prioritizing safety.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Fractional laser vs. microneedling for acne scars \u2014 which is better?<\/div>\n<div class=\"faq-a\">Efficacy gradient: CO2 fractional > Fraxel > RF microneedling (e.g., Vivace) > traditional microneedling\/dermaroller > at-home dermaroller. Explanation: (1) CO2 \u2014 dual mechanism (ablative vaporization + deep thermal effect), deepest penetration and strongest collagen stimulation, suitable for moderate-to-severe scars \u2014 but longest recovery (1 week). (2) Fraxel \u2014 pure thermal, non-ablative; moderate depth and intensity; suitable for mild-to-moderate scars \u2014 short recovery (2-3 days). (3) RF microneedling \u2014 microneedle dermal penetration + needle-tip RF heating; moderate strength; advantage: color-blind (RF energy does not rely on melanin absorption, unlike light-based lasers) \u2014 suitable for mild scars and all skin types. (4) Traditional microneedling \u2014 purely physical puncture stimulation; limited collagen induction; suitable for very mild texture improvement and skincare product delivery enhancement. (5) At-home rollers \u2014 needle length insufficient to reach dermis; minimal effect. Rappoel matches optimal technology or combination to your scar type and severity during consultation.<\/div>\n<\/div>\n<div class=\"cta\">\n<h3>Used countless serums but acne scars still deeply pitted? Rappoel fractional laser combination repair \u2014 rebuild smooth, youthful skin from deep within<\/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>Teenage acne pits still ‘pitting’ you a decade later? 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