Short answer:
TCA CROSS (Chemical Reconstruction of Skin Scars) is a technique where a doctor places a tiny amount of high-strength trichloroacetic acid directly into the base of each icepick scar. The controlled injury triggers new collagen that gradually raises the scar floor. In Gangnam it typically costs ₩100,000–₩300,000 per session, needs 3–5 sessions, and leaves small crusts for 5–7 days.
Why icepick scars need special treatment
Icepick scars are narrow, deep channels that can extend into the deeper dermis. Surface lasers and fillers struggle to reach the bottom of such a narrow track, which is why spot treatment like TCA CROSS is one of the standard approaches for them.
How the procedure works
- Cleansing and marking:
each icepick scar is identified under good lighting.
- Application:
a fine applicator or sharpened wooden tip delivers high-strength TCA into each scar until the skin turns white, called frosting.
- Neutralising and calming:
the area is cooled and protected.
The whole face usually takes 15–30 minutes. It stings briefly, but numbing is often not needed because only tiny points are treated.
Healing timeline
- Day 0–1:
white frosting turns into small red or brown dots.
- Days 2–7:
tiny dark crusts form; do not pick them.
- Days 5–7:
crusts fall off, leaving pink spots.
- Weeks 2–6:
pinkness fades and collagen continues to build.
The next session is usually scheduled 4–6 weeks later.
Realistic results
Each session typically makes icepick scars shallower rather than erasing them. After 3–5 sessions many patients see a clear improvement, and the change is permanent because the scar base has been rebuilt. TCA CROSS is often combined with subcision
for rolling scars, Rejuran S, or fractional CO2 laser
for overall texture.
Risks and who should be careful
- Post-inflammatory hyperpigmentation:
darker spots after healing, more common in medium and darker skin, usually fading over weeks to months.
- Widening or white spots:
uncommon, more likely if too much acid is applied.
- Infection:
rare with proper aftercare.
Avoid TCA CROSS during active acne in the area, pregnancy, or if you are prone to keloids, and stop isotretinoin according to your doctor's advice beforehand.
TCA CROSS price in Gangnam (2026)
- Typical range:
₩100,000–₩300,000 per session, about $70–$210.
- Pricing basis:
some clinics charge per area, others per number of scars.
See our TCA CROSS treatment guide
and acne scar options.
Aftercare
- Keep the area clean and apply the ointment your doctor gives you.
- Let crusts fall off naturally.
- Use strict sun protection for at least 4–6 weeks.
- Avoid makeup on treated spots until crusts have gone, unless your doctor allows it.
Frequently asked questions
Does TCA CROSS work on all acne scars?
It is designed for icepick and narrow boxcar scars. Rolling scars respond better to subcision.
How many sessions do I need?
Usually 3–5 sessions, about 4–6 weeks apart.
Can I do it on a short trip?
You will have visible crusts for about a week, so plan time accordingly and avoid strong sun.
Is it painful?
It stings for a few seconds per scar; most people tolerate it without numbing.
How much does TCA CROSS cost?
Typically ₩100,000–₩300,000 per session in Gangnam in 2026.
This article is general information, not medical advice. Suitability, settings and results vary by person. Always consult a licensed doctor and get an itemised written quote before treatment. Prices are typical 2026 Gangnam planning ranges at about 1 USD = ₩1,400 and change often. Updated October 2026.
