Knee Skin Tightening in Seoul: Thermage FLX for Sagging Knee Skin at Rappoel Dermatology Gangnam<\/title><br \/>\n<meta name=\"description\" content=\"Sagging knee skin with visible wrinkles making your legs look old? Self-conscious in shorts and skirts? Rappoel Dermatology uses Thermage FLX \u2014 RF deep heating of collagen, 45 minutes to improve knee laxity\">\n<link rel=\"alternate\" hreflang=\"en\" href=\"https:\/\/rappoel-clinic.com\/thermage-flx-knee-tightening-en\/\" \/>\n<link rel=\"alternate\" hreflang=\"zh-TW\" href=\"https:\/\/rappoel-clinic.com\/thermage-flx-knee-tightening-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\": \"Knee Skin Tightening in Seoul: Thermage FLX for Sagging Knee Skin at Rappoel Dermatology Gangnam\", \"description\": \"Sagging knee skin with visible wrinkles making your legs look old? Self-conscious in shorts and skirts? Rappoel Dermatology uses Thermage FLX \u2014 RF deep heating of collagen, 45 minutes to improve knee laxity\", \"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 long do Thermage FLX knee tightening results last? Do I need repeated treatments?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Thermage FLX knee tightening lasts 1-2 years \u2014 immediate collagen contraction provides tightening, with continued improvement over 3-6 months from collagen neogenesis, peaking at 6 months and stabilizing. Rappoel recommends: most need only one treatment for visible improvement, lasting 1-2 years. For moderate or greater laxity, assess at 6 months for a possible second enhancement. Regular maintenance: Thermage FLX every 1-2 years maintains collagen vitality. Those with thinner knee skin may see slightly shorter results \u2014 daily moisturizing and sun protection help extend effects.\"}}, {\"@type\": \"Question\", \"name\": \"Is knee Thermage painful? 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Which is better for me?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"They solve different problems: (1) Thermage FLX \u2014 improves skin laxity and texture through RF heating stimulating collagen neogenesis. Suitable for: primarily skin laxity with minimal fat. Non-surgical, no recovery, 45 minutes, lasting 1-2 years. But only improves skin quality, cannot remove significant fat. (2) Liposuction \u2014 removes excess fat through surgical aspiration. Suitable for: obvious fat accumulation with adequate skin elasticity. Requires surgery, recovery (1-2 weeks), permanent fat reduction. But post-liposuction skin may be looser. Rappoel recommends: (1) If knee laxity is primarily skin \u2192 Thermage FLX. (2) If knee has obvious fat accumulation \u2192 Onda microwave lipolysis. (3) If both fat and skin laxity \u2192 Onda + Thermage FLX combined.\"}}, {\"@type\": \"Question\", \"name\": \"Are there side effects or risks with knee Thermage?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Thermage FLX is an FDA-cleared non-invasive device with clinically validated safety. Common reactions: (1) Mild redness and swelling post-treatment \u2014 resolves within 30 minutes to several hours. (2) Mild tenderness in treatment area \u2014 resolves in 1-3 days. (3) Occasional mild edema in a few \u2014 resolves within 1 week. Rare risks: (1) Blistering or burn \u2014 extremely rare, typically from improper operation or very thin skin. (2) Hyperpigmentation \u2014 darker skin types may experience temporary pigmentation with excessive energy, resolving over weeks to months. (3) Inadequate response \u2014 about 5-10% respond poorly to RF, may need enhanced treatment. Rappoel minimizes risk through pre-treatment skin assessment, ACCuREP monitoring, and standardized protocols.\"}}, {\"@type\": \"Question\", \"name\": \"Who is a good candidate for knee Thermage? Who is not suitable?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Good candidates: (1) Ages 30-60 with mild to moderate knee skin laxity \u2014 good collagen neogenesis capacity, best results. (2) Those with post-weight-loss knee skin laxity \u2014 improving skin quality. (3) Those wanting tighter knees in shorts and skirts. (4) Those preferring non-invasive improvement without surgery. Not suitable: (1) Severe knee skin laxity (shar-pei-like excess skin) \u2014 needs surgical excision. (2) Those with active skin disease, infection, or wounds on the knee. (3) Those with metal implants in the knee (like artificial joints) \u2014 RF may heat metal. (4) Pregnant or breastfeeding women. (5) Severe diabetes or circulation disorders \u2014 affecting collagen neogenesis. (6) Non-responders to RF (about 5-10%). Rappoel recommends an in-person assessment first.\"}}]}<\/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>Knee Skin Tightening in Seoul: Thermage FLX for Sagging Knee Skin at Rappoel Dermatology Gangnam<\/h1>\n<div class=\"sub\">Sagging knee skin with visible wrinkles making your legs look old? Self-conscious in shorts and skirts? Rappoel Dermatology uses Thermage FLX \u2014 RF deep heating of collagen, 45 minutes to improve knee laxity<\/div>\n<\/p><\/div>\n<p>Knee skin laxity is an aesthetic concern many overlook but certainly exists \u2014 with aging, repeated weight fluctuations, or chronic postural pressure on the knees, the skin around the knees gradually loses elasticity, sagging with visible wrinkles and creases. Knee sagging is especially visible in shorts and skirts, making the entire leg look ‘aged.’ Causes: (1) Aging \u2014 collagen and elastin loss, reduced knee skin elasticity. (2) Repeated weight loss \u2014 weight fluctuations damage skin elasticity, leaving excess saggy skin at the knees. (3) Genetic factors \u2014 some naturally have thinner knee skin with less collagen. (4) Sun damage \u2014 knees chronically sun-exposed, UV accelerating collagen degradation. Rappoel Dermatology near Gangnam Station, Seoul, uses Thermage FLX \u2014 monopolar radiofrequency (RF) deep heating of dermal collagen, stimulating collagen neogenesis and remodeling, 45 non-surgical minutes to improve knee skin laxity.<\/p>\n<h2>Technical Advantages of Thermage FLX Knee Tightening<\/h2>\n<ul>\n<li><strong>Monopolar RF deep heating:<\/strong> Thermage FLX uses 4.0MHz monopolar RF \u2014 energy penetrates to deep dermis and subcutaneous tissue (2.4-4.3mm depth), heating collagen to 65-75\u00b0C for contraction and denaturation, while cooling spray protects the epidermis (surface maintained at 35-40\u00b0C), safe and deeply effective<\/li>\n<li><strong>ACCuREP automatic impedance monitoring:<\/strong> Fourth-generation FLX technology \u2014 monitors skin impedance 200 times per second, automatically adjusting RF output for uniform, stable energy. Knee skin thickness varies (thin above the patella, thicker on sides) \u2014 ACCuREP ensures all areas receive appropriate heating, avoiding over or under-treatment<\/li>\n<li><strong>Instant contraction + long-term neogenesis:<\/strong> After RF heating, existing collagen contracts immediately \u2014 visible skin tightening right after treatment. Over 3-6 months, thermal injury triggers collagen neogenesis and remodeling \u2014 skin continues improving, peaking at 6 months<\/li>\n<li><strong>No recovery, single treatment:<\/strong> Thermage FLX knee treatment takes about 45 minutes \u2014 return to normal activities immediately, no recovery. Most need only one treatment for visible improvement, lasting 1-2 years<\/li>\n<li><strong>3.0cm\u00b2 large tip for efficiency:<\/strong> FLX features a 3.0cm\u00b2 tip (33% larger than CPT) \u2014 the knee area is small but irregularly shaped; the large tip with vibration massage improves coverage efficiency and comfort<\/li>\n<\/ul>\n<h2>Treatment Strategies for Different Knee Issues<\/h2>\n<ul>\n<li><strong>Mild laxity (early wrinkles):<\/strong> Fine lines and slight creasing on knee skin. Strategy: single Thermage FLX treatment (400-600 pulses), stimulating collagen neogenesis, visibly improved firmness at 3-6 months<\/li>\n<li><strong>Moderate laxity (visible creases):<\/strong> Clearly sagging knee skin, visible creases when standing. Strategy: enhanced Thermage FLX (600-900 pulses), focusing on the area above the patella and lateral creases \u2014 may need 2 treatments (6 months apart) for ideal results<\/li>\n<li><strong>Severe laxity (excess skin drooping):<\/strong> Shar-pei-like excess skin sagging at knees. Strategy: Thermage FLX can improve skin texture, but severe laxity may need surgery (knee skin excision). In-person assessment recommended<\/li>\n<li><strong>Laxity + fat accumulation type:<\/strong> Fat above the knee with skin laxity. Strategy: Onda microwave lipolysis to reduce fat (10-15 min per side) + Thermage FLX for skin tightening \u2014 lipolysis provides volume reduction, RF provides skin tightening, dual improvement<\/li>\n<li><strong>Asymmetric knees type:<\/strong> One knee saggier than the other. Strategy: Thermage FLX enhanced on the saggier side \u2014 different pulse counts per side for symmetry<\/li>\n<\/ul>\n<h2>Rappoel Knee Thermage FLX Treatment Protocol<\/h2>\n<ol>\n<li><strong>Knee assessment and plan design (10 min):<\/strong> Standing and seated assessment of knee laxity degree, skin texture, crease distribution \u2192 photograph \u2192 establish treatment plan (pulses, focus areas, lipolysis combination)<\/li>\n<li><strong>Cleansing and marking (5 min):<\/strong> Cleanse both knees \u2192 dry \u2192 mark treatment area (10cm above to 5cm below the knee, including around the patella and sides) \u2192 apply treatment grid stickers<\/li>\n<li><strong>Thermage FLX treatment (30-40 min):<\/strong> Apply coupling gel \u2192 treat grid by grid with 3.0cm\u00b2 tip \u2192 cooling spray and vibration massage with each pulse \u2192 enhance above-patella crease areas (extra pulses per grid) \u2192 even coverage on both sides \u2192 total 400-900 pulses (adjusted by laxity degree)<\/li>\n<li><strong>Immediate assessment and guidance (5 min):<\/strong> Post-treatment photographs for comparison \u2192 patient stands to confirm knee tightening \u2192 post-care instructions (avoid strenuous exercise for 24 hours, avoid high-heat like sauna for 1 week, avoid kneeling postures, moisturize and sun-protect) \u2192 3-month follow-up<\/li>\n<\/ol>\n<p>The knee Thermage FLX treatment takes about 45-60 minutes, with immediate skin tightening visible, continued improvement over 3-6 months, lasting 1-2 years. Located 3 minutes 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 long do Thermage FLX knee tightening results last? Do I need repeated treatments?<\/div>\n<div class=\"faq-a\">Thermage FLX knee tightening lasts 1-2 years \u2014 immediate collagen contraction provides tightening, with continued improvement over 3-6 months from collagen neogenesis, peaking at 6 months and stabilizing. Rappoel recommends: most need only one treatment for visible improvement, lasting 1-2 years. For moderate or greater laxity, assess at 6 months for a possible second enhancement. Regular maintenance: Thermage FLX every 1-2 years maintains collagen vitality. Those with thinner knee skin may see slightly shorter results \u2014 daily moisturizing and sun protection help extend effects.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Is knee Thermage painful? How comfortable is the treatment?<\/div>\n<div class=\"faq-a\">Thermage FLX fourth-generation technology greatly improved comfort \u2014 (1) Cooling spray: each RF pulse is preceded by cooling agent (-30\u00b0C) to protect the epidermis, ensuring energy penetrates deeply while the surface doesn’t overheat. (2) Vibration massage: the tip has a built-in vibration mechanism, using tactile signals to interfere with pain conduction, reducing discomfort. (3) ACCuREP auto-adjustment: real-time skin impedance monitoring, automatically reducing power in thinner areas (like above the patella), avoiding excessive heating. Knee skin is thicker than facial skin \u2014 most patients rate pain 3-5 out of 10, tolerable. For sensitive patients, topical anesthetic cream can be applied 40 minutes before. Overall comfort is far superior to older-generation devices.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">What is the difference between knee Thermage and liposuction? Which is better for me?<\/div>\n<div class=\"faq-a\">They solve different problems: (1) Thermage FLX \u2014 improves skin laxity and texture through RF heating stimulating collagen neogenesis. Suitable for: primarily skin laxity with minimal fat. Non-surgical, no recovery, 45 minutes, lasting 1-2 years. But only improves skin quality, cannot remove significant fat. (2) Liposuction \u2014 removes excess fat through surgical aspiration. Suitable for: obvious fat accumulation with adequate skin elasticity. Requires surgery, recovery (1-2 weeks), permanent fat reduction. But post-liposuction skin may be looser. Rappoel recommends: (1) If knee laxity is primarily skin \u2192 Thermage FLX. (2) If knee has obvious fat accumulation \u2192 Onda microwave lipolysis. (3) If both fat and skin laxity \u2192 Onda + Thermage FLX combined.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Are there side effects or risks with knee Thermage?<\/div>\n<div class=\"faq-a\">Thermage FLX is an FDA-cleared non-invasive device with clinically validated safety. Common reactions: (1) Mild redness and swelling post-treatment \u2014 resolves within 30 minutes to several hours. (2) Mild tenderness in treatment area \u2014 resolves in 1-3 days. (3) Occasional mild edema in a few \u2014 resolves within 1 week. Rare risks: (1) Blistering or burn \u2014 extremely rare, typically from improper operation or very thin skin. (2) Hyperpigmentation \u2014 darker skin types may experience temporary pigmentation with excessive energy, resolving over weeks to months. (3) Inadequate response \u2014 about 5-10% respond poorly to RF, may need enhanced treatment. Rappoel minimizes risk through pre-treatment skin assessment, ACCuREP monitoring, and standardized protocols.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Who is a good candidate for knee Thermage? Who is not suitable?<\/div>\n<div class=\"faq-a\">Good candidates: (1) Ages 30-60 with mild to moderate knee skin laxity \u2014 good collagen neogenesis capacity, best results. (2) Those with post-weight-loss knee skin laxity \u2014 improving skin quality. (3) Those wanting tighter knees in shorts and skirts. (4) Those preferring non-invasive improvement without surgery. Not suitable: (1) Severe knee skin laxity (shar-pei-like excess skin) \u2014 needs surgical excision. (2) Those with active skin disease, infection, or wounds on the knee. (3) Those with metal implants in the knee (like artificial joints) \u2014 RF may heat metal. (4) Pregnant or breastfeeding women. (5) Severe diabetes or circulation disorders \u2014 affecting collagen neogenesis. (6) Non-responders to RF (about 5-10%). Rappoel recommends an in-person assessment first.<\/div>\n<\/div>\n<div class=\"cta\">\n<h3>Sagging knee wrinkles making your legs look old? Rappoel Thermage FLX knee tightening \u2014 45 minutes non-surgical skin firming!<\/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>Sagging knee skin with visible wrinkles making your legs look old? Self-conscious in shorts and skirts? Rappoel Dermatology uses Thermage FLX \u2014 RF deep heating of collagen, 45 minutes to improve knee laxity<\/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-1794","post","type-post","status-publish","format-standard","hentry","category-laser-en"],"_links":{"self":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1794","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=1794"}],"version-history":[{"count":1,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1794\/revisions"}],"predecessor-version":[{"id":1796,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/posts\/1794\/revisions\/1796"}],"wp:attachment":[{"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/media?parent=1794"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/categories?post=1794"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rappoel-clinic.com\/en\/wp-json\/wp\/v2\/tags?post=1794"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

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\nKnee Skin Tightening in Seoul: Thermage FLX for Sagging Knee Skin at Rappoel Dermatology Gangnam<\/title><br \/>\n<meta name=\"description\" content=\"Sagging knee skin with visible wrinkles making your legs look old? Self-conscious in shorts and skirts? Rappoel Dermatology uses Thermage FLX \u2014 RF deep heating of collagen, 45 minutes to improve knee laxity\">\n<link rel=\"alternate\" hreflang=\"en\" href=\"https:\/\/rappoel-clinic.com\/thermage-flx-knee-tightening-en\/\" \/>\n<link rel=\"alternate\" hreflang=\"zh-TW\" href=\"https:\/\/rappoel-clinic.com\/thermage-flx-knee-tightening-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\": \"Knee Skin Tightening in Seoul: Thermage FLX for Sagging Knee Skin at Rappoel Dermatology Gangnam\", \"description\": \"Sagging knee skin with visible wrinkles making your legs look old? Self-conscious in shorts and skirts? Rappoel Dermatology uses Thermage FLX \u2014 RF deep heating of collagen, 45 minutes to improve knee laxity\", \"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 long do Thermage FLX knee tightening results last? 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Which is better for me?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"They solve different problems: (1) Thermage FLX \u2014 improves skin laxity and texture through RF heating stimulating collagen neogenesis. Suitable for: primarily skin laxity with minimal fat. Non-surgical, no recovery, 45 minutes, lasting 1-2 years. But only improves skin quality, cannot remove significant fat. (2) Liposuction \u2014 removes excess fat through surgical aspiration. Suitable for: obvious fat accumulation with adequate skin elasticity. Requires surgery, recovery (1-2 weeks), permanent fat reduction. But post-liposuction skin may be looser. Rappoel recommends: (1) If knee laxity is primarily skin \u2192 Thermage FLX. (2) If knee has obvious fat accumulation \u2192 Onda microwave lipolysis. (3) If both fat and skin laxity \u2192 Onda + Thermage FLX combined.\"}}, {\"@type\": \"Question\", \"name\": \"Are there side effects or risks with knee Thermage?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Thermage FLX is an FDA-cleared non-invasive device with clinically validated safety. Common reactions: (1) Mild redness and swelling post-treatment \u2014 resolves within 30 minutes to several hours. (2) Mild tenderness in treatment area \u2014 resolves in 1-3 days. (3) Occasional mild edema in a few \u2014 resolves within 1 week. Rare risks: (1) Blistering or burn \u2014 extremely rare, typically from improper operation or very thin skin. (2) Hyperpigmentation \u2014 darker skin types may experience temporary pigmentation with excessive energy, resolving over weeks to months. (3) Inadequate response \u2014 about 5-10% respond poorly to RF, may need enhanced treatment. Rappoel minimizes risk through pre-treatment skin assessment, ACCuREP monitoring, and standardized protocols.\"}}, {\"@type\": \"Question\", \"name\": \"Who is a good candidate for knee Thermage? Who is not suitable?\", \"acceptedAnswer\": {\"@type\": \"Answer\", \"text\": \"Good candidates: (1) Ages 30-60 with mild to moderate knee skin laxity \u2014 good collagen neogenesis capacity, best results. (2) Those with post-weight-loss knee skin laxity \u2014 improving skin quality. (3) Those wanting tighter knees in shorts and skirts. (4) Those preferring non-invasive improvement without surgery. Not suitable: (1) Severe knee skin laxity (shar-pei-like excess skin) \u2014 needs surgical excision. (2) Those with active skin disease, infection, or wounds on the knee. (3) Those with metal implants in the knee (like artificial joints) \u2014 RF may heat metal. (4) Pregnant or breastfeeding women. (5) Severe diabetes or circulation disorders \u2014 affecting collagen neogenesis. (6) Non-responders to RF (about 5-10%). Rappoel recommends an in-person assessment first.\"}}]}<\/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>Knee Skin Tightening in Seoul: Thermage FLX for Sagging Knee Skin at Rappoel Dermatology Gangnam<\/h1>\n<div class=\"sub\">Sagging knee skin with visible wrinkles making your legs look old? Self-conscious in shorts and skirts? Rappoel Dermatology uses Thermage FLX \u2014 RF deep heating of collagen, 45 minutes to improve knee laxity<\/div>\n<\/p><\/div>\n<p>Knee skin laxity is an aesthetic concern many overlook but certainly exists \u2014 with aging, repeated weight fluctuations, or chronic postural pressure on the knees, the skin around the knees gradually loses elasticity, sagging with visible wrinkles and creases. Knee sagging is especially visible in shorts and skirts, making the entire leg look ‘aged.’ Causes: (1) Aging \u2014 collagen and elastin loss, reduced knee skin elasticity. (2) Repeated weight loss \u2014 weight fluctuations damage skin elasticity, leaving excess saggy skin at the knees. (3) Genetic factors \u2014 some naturally have thinner knee skin with less collagen. (4) Sun damage \u2014 knees chronically sun-exposed, UV accelerating collagen degradation. Rappoel Dermatology near Gangnam Station, Seoul, uses Thermage FLX \u2014 monopolar radiofrequency (RF) deep heating of dermal collagen, stimulating collagen neogenesis and remodeling, 45 non-surgical minutes to improve knee skin laxity.<\/p>\n<h2>Technical Advantages of Thermage FLX Knee Tightening<\/h2>\n<ul>\n<li><strong>Monopolar RF deep heating:<\/strong> Thermage FLX uses 4.0MHz monopolar RF \u2014 energy penetrates to deep dermis and subcutaneous tissue (2.4-4.3mm depth), heating collagen to 65-75\u00b0C for contraction and denaturation, while cooling spray protects the epidermis (surface maintained at 35-40\u00b0C), safe and deeply effective<\/li>\n<li><strong>ACCuREP automatic impedance monitoring:<\/strong> Fourth-generation FLX technology \u2014 monitors skin impedance 200 times per second, automatically adjusting RF output for uniform, stable energy. Knee skin thickness varies (thin above the patella, thicker on sides) \u2014 ACCuREP ensures all areas receive appropriate heating, avoiding over or under-treatment<\/li>\n<li><strong>Instant contraction + long-term neogenesis:<\/strong> After RF heating, existing collagen contracts immediately \u2014 visible skin tightening right after treatment. Over 3-6 months, thermal injury triggers collagen neogenesis and remodeling \u2014 skin continues improving, peaking at 6 months<\/li>\n<li><strong>No recovery, single treatment:<\/strong> Thermage FLX knee treatment takes about 45 minutes \u2014 return to normal activities immediately, no recovery. Most need only one treatment for visible improvement, lasting 1-2 years<\/li>\n<li><strong>3.0cm\u00b2 large tip for efficiency:<\/strong> FLX features a 3.0cm\u00b2 tip (33% larger than CPT) \u2014 the knee area is small but irregularly shaped; the large tip with vibration massage improves coverage efficiency and comfort<\/li>\n<\/ul>\n<h2>Treatment Strategies for Different Knee Issues<\/h2>\n<ul>\n<li><strong>Mild laxity (early wrinkles):<\/strong> Fine lines and slight creasing on knee skin. Strategy: single Thermage FLX treatment (400-600 pulses), stimulating collagen neogenesis, visibly improved firmness at 3-6 months<\/li>\n<li><strong>Moderate laxity (visible creases):<\/strong> Clearly sagging knee skin, visible creases when standing. Strategy: enhanced Thermage FLX (600-900 pulses), focusing on the area above the patella and lateral creases \u2014 may need 2 treatments (6 months apart) for ideal results<\/li>\n<li><strong>Severe laxity (excess skin drooping):<\/strong> Shar-pei-like excess skin sagging at knees. Strategy: Thermage FLX can improve skin texture, but severe laxity may need surgery (knee skin excision). In-person assessment recommended<\/li>\n<li><strong>Laxity + fat accumulation type:<\/strong> Fat above the knee with skin laxity. Strategy: Onda microwave lipolysis to reduce fat (10-15 min per side) + Thermage FLX for skin tightening \u2014 lipolysis provides volume reduction, RF provides skin tightening, dual improvement<\/li>\n<li><strong>Asymmetric knees type:<\/strong> One knee saggier than the other. Strategy: Thermage FLX enhanced on the saggier side \u2014 different pulse counts per side for symmetry<\/li>\n<\/ul>\n<h2>Rappoel Knee Thermage FLX Treatment Protocol<\/h2>\n<ol>\n<li><strong>Knee assessment and plan design (10 min):<\/strong> Standing and seated assessment of knee laxity degree, skin texture, crease distribution \u2192 photograph \u2192 establish treatment plan (pulses, focus areas, lipolysis combination)<\/li>\n<li><strong>Cleansing and marking (5 min):<\/strong> Cleanse both knees \u2192 dry \u2192 mark treatment area (10cm above to 5cm below the knee, including around the patella and sides) \u2192 apply treatment grid stickers<\/li>\n<li><strong>Thermage FLX treatment (30-40 min):<\/strong> Apply coupling gel \u2192 treat grid by grid with 3.0cm\u00b2 tip \u2192 cooling spray and vibration massage with each pulse \u2192 enhance above-patella crease areas (extra pulses per grid) \u2192 even coverage on both sides \u2192 total 400-900 pulses (adjusted by laxity degree)<\/li>\n<li><strong>Immediate assessment and guidance (5 min):<\/strong> Post-treatment photographs for comparison \u2192 patient stands to confirm knee tightening \u2192 post-care instructions (avoid strenuous exercise for 24 hours, avoid high-heat like sauna for 1 week, avoid kneeling postures, moisturize and sun-protect) \u2192 3-month follow-up<\/li>\n<\/ol>\n<p>The knee Thermage FLX treatment takes about 45-60 minutes, with immediate skin tightening visible, continued improvement over 3-6 months, lasting 1-2 years. Located 3 minutes 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 long do Thermage FLX knee tightening results last? Do I need repeated treatments?<\/div>\n<div class=\"faq-a\">Thermage FLX knee tightening lasts 1-2 years \u2014 immediate collagen contraction provides tightening, with continued improvement over 3-6 months from collagen neogenesis, peaking at 6 months and stabilizing. Rappoel recommends: most need only one treatment for visible improvement, lasting 1-2 years. For moderate or greater laxity, assess at 6 months for a possible second enhancement. Regular maintenance: Thermage FLX every 1-2 years maintains collagen vitality. Those with thinner knee skin may see slightly shorter results \u2014 daily moisturizing and sun protection help extend effects.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Is knee Thermage painful? How comfortable is the treatment?<\/div>\n<div class=\"faq-a\">Thermage FLX fourth-generation technology greatly improved comfort \u2014 (1) Cooling spray: each RF pulse is preceded by cooling agent (-30\u00b0C) to protect the epidermis, ensuring energy penetrates deeply while the surface doesn’t overheat. (2) Vibration massage: the tip has a built-in vibration mechanism, using tactile signals to interfere with pain conduction, reducing discomfort. (3) ACCuREP auto-adjustment: real-time skin impedance monitoring, automatically reducing power in thinner areas (like above the patella), avoiding excessive heating. Knee skin is thicker than facial skin \u2014 most patients rate pain 3-5 out of 10, tolerable. For sensitive patients, topical anesthetic cream can be applied 40 minutes before. Overall comfort is far superior to older-generation devices.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">What is the difference between knee Thermage and liposuction? Which is better for me?<\/div>\n<div class=\"faq-a\">They solve different problems: (1) Thermage FLX \u2014 improves skin laxity and texture through RF heating stimulating collagen neogenesis. Suitable for: primarily skin laxity with minimal fat. Non-surgical, no recovery, 45 minutes, lasting 1-2 years. But only improves skin quality, cannot remove significant fat. (2) Liposuction \u2014 removes excess fat through surgical aspiration. Suitable for: obvious fat accumulation with adequate skin elasticity. Requires surgery, recovery (1-2 weeks), permanent fat reduction. But post-liposuction skin may be looser. Rappoel recommends: (1) If knee laxity is primarily skin \u2192 Thermage FLX. (2) If knee has obvious fat accumulation \u2192 Onda microwave lipolysis. (3) If both fat and skin laxity \u2192 Onda + Thermage FLX combined.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Are there side effects or risks with knee Thermage?<\/div>\n<div class=\"faq-a\">Thermage FLX is an FDA-cleared non-invasive device with clinically validated safety. Common reactions: (1) Mild redness and swelling post-treatment \u2014 resolves within 30 minutes to several hours. (2) Mild tenderness in treatment area \u2014 resolves in 1-3 days. (3) Occasional mild edema in a few \u2014 resolves within 1 week. Rare risks: (1) Blistering or burn \u2014 extremely rare, typically from improper operation or very thin skin. (2) Hyperpigmentation \u2014 darker skin types may experience temporary pigmentation with excessive energy, resolving over weeks to months. (3) Inadequate response \u2014 about 5-10% respond poorly to RF, may need enhanced treatment. Rappoel minimizes risk through pre-treatment skin assessment, ACCuREP monitoring, and standardized protocols.<\/div>\n<\/div>\n<div class=\"faq-item\">\n<div class=\"faq-q\">Who is a good candidate for knee Thermage? Who is not suitable?<\/div>\n<div class=\"faq-a\">Good candidates: (1) Ages 30-60 with mild to moderate knee skin laxity \u2014 good collagen neogenesis capacity, best results. (2) Those with post-weight-loss knee skin laxity \u2014 improving skin quality. (3) Those wanting tighter knees in shorts and skirts. (4) Those preferring non-invasive improvement without surgery. Not suitable: (1) Severe knee skin laxity (shar-pei-like excess skin) \u2014 needs surgical excision. (2) Those with active skin disease, infection, or wounds on the knee. (3) Those with metal implants in the knee (like artificial joints) \u2014 RF may heat metal. (4) Pregnant or breastfeeding women. (5) Severe diabetes or circulation disorders \u2014 affecting collagen neogenesis. (6) Non-responders to RF (about 5-10%). Rappoel recommends an in-person assessment first.<\/div>\n<\/div>\n<div class=\"cta\">\n<h3>Sagging knee wrinkles making your legs look old? Rappoel Thermage FLX knee tightening \u2014 45 minutes non-surgical skin firming!<\/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>Sagging knee skin with visible wrinkles making your legs look old? 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