TCA CROSS for Acne Scars in Seoul, Korea
TCA CROSS places a tiny amount of high-strength acid into the base of deep, narrow acne scars to trigger collagen remodelling from within — a precise, low-downtime option for ice-pick scars at NEST Clinic, Gangnam.
- Session 15–30 min
- Sessions 2–6 typical
- Downtime 3–7 days
- From ₩80,000
🌸 Quick answer
What is TCA CROSS best for? TCA CROSS is best for deep, narrow acne scars — especially ice-pick and small boxcar scars — that broad resurfacing struggles to reach. A tiny amount of high-concentration trichloroacetic acid is applied into the base of each scar, triggering controlled collagen remodelling so the scar gradually rises and softens. Most people need 2–6 sessions spaced 4–6 weeks apart, with only spot-specific downtime.
What is TCA CROSS?
TCA CROSS stands for Chemical Reconstruction of Skin Scars. A fine applicator places a small amount of high-concentration TCA (trichloroacetic acid) directly into the base of an individual acne scar. This controlled injury triggers collagen remodelling from within, so depressed scars gradually rise and become less noticeable while the surrounding skin is left untouched.
It is particularly suited to deep ice-pick and narrow boxcar scars. For wider rolling scars, it is often combined with subcision, laser or RF microneedling as part of a fuller acne scar treatment plan.
Best for
- Ice-pick scars
- Narrow boxcar scars
- Deep atrophic scars
- Pitted, small vertical scars
Why people choose it
- Reaches deep, narrow scars
- Treats only the scar, protecting nearby skin
- Minimal, spot-specific downtime
- Stimulates collagen naturally
- Cost-effective and combines well
Before & after: what changes
Each treated scar scabs briefly, then the base rises as collagen rebuilds over the following weeks.
Who is TCA CROSS for?
A good fit if you have
- Ice-pick or narrow boxcar scars
- Deep, pitted vertical scars
- Scars not helped by resurfacing alone
- Realistic, multi-session expectations
Less suitable if you have
- Mainly rolling scars (consider subcision)
- Active acne or infection in the area
- A tendency to keloid without doctor review
- Expectations of clearing in one session
How TCA CROSS works, step by step
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Cleanse and prep
The skin is cleaned and sometimes numbed before treatment.
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Precise application
A tiny amount of high-strength TCA is placed into each scar base with a pointed tool.
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Frosting reaction
The spot turns white (frosting), signalling that collagen stimulation has begun.
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Healing and remodelling
Small scabs form within days then peel, and scar depth steadily improves over 4–8 weeks.
Recovery and results timeline
Downtime is mild and spot-specific — brief white frosting, 2–3 days of redness or darkening, small scabs for 3–7 days and peeling up to a week. Strict sun protection helps prevent pigmentation, especially on darker skin.
- Minutes White frosting appears
- 2–3 days Redness or darkening
- 3–7 days Small scabs, then peeling
- 1–2 months Collagen remodelling; scar rises
TCA CROSS cost in Seoul
Pricing depends on the number of scars, clinic and any combination treatments. International patients pay the same local price, confirmed at consultation.
| Per session | ₩80,000 – ₩200,000 |
|---|---|
| Packages | 3–5 session discounts may apply |
| Add-on laser or microneedling | Additional fee per session |
| Sessions | 2–4 moderate, 4–6 deep ice-pick |
| Spacing | Every 4–6 weeks |
| Downtime | Spot-specific scabs, 3–7 days |
Medically reviewed by
Dr. Heein Song · Medical Doctor, NEST Clinic
Graduate of Seoul National University College of Medicine. Member of Korean societies for aesthetic laser, skin and hair medicine, obesity aesthetics and facial fillers.
TCA CROSS FAQ
How much does TCA CROSS cost in Seoul?
TCA CROSS typically costs ₩80,000–₩200,000 per session, often with discounts for 3–5 session packages and an added fee for combined laser or microneedling. International patients pay the same local price.
How many TCA CROSS sessions will I need?
Most people need 2–4 sessions for moderate scars and 4–6 for very deep ice-pick scars, spaced 4–6 weeks apart. Collagen keeps remodelling for weeks after each session.
Does TCA CROSS hurt?
There is a brief sting as the acid is applied, then warmth during the frosting reaction. Numbing can be used if you are sensitive, and because only the scar base is treated, discomfort is very localised.
Is TCA CROSS safe for melanin-rich skin?
Yes, with care — controlled concentrations, full healing between sessions, strict SPF 50+, and sometimes pre-treatment brightening to lower the risk of post-inflammatory hyperpigmentation.
What is the downtime?
It is mild and limited to the treated spots: white frosting for minutes, 2–3 days of redness or darkening, small scabs for 3–7 days and some peeling. Avoid picking scabs so they heal cleanly.
TCA CROSS or laser — which should I choose?
TCA CROSS targets individual deep, narrow scars, while laser resurfaces whole-face texture. They are often complementary, and many Seoul clinics combine them for maximum improvement.
Often considered with TCA CROSS
Struggling with deep ice-pick scars?
Send a close, well-lit photo on WhatsApp — our doctors will confirm whether TCA CROSS, on its own or combined, suits your scar type and skin.