TCA CROSS Singapore | Treatment for Icepick Acne Scars
TCA CROSS – Targeting Deep Icepick Acne Scars in Singapore
Icepick scars are the narrow, deep “pitted” scars that look like the skin has been pricked with a fine point. They are notoriously difficult to treat because they are too deep and too narrow for most resurfacing lasers or general peels to reach the base.
TCA CROSS, or Chemical Reconstruction of Skin Scars using trichloroacetic acid, is a detailed, doctor-performed technique that applies a high concentration of TCA to the base of each individual scar, and nowhere else. This causes a focal chemical injury that stimulates new collagen synthesis and dermal remodelling, gradually raising the floor of the scar and reducing its depth over multiple sessions (JCAD comprehensive review, 2025; DermNet NZ).
How Effective is TCA Cross for Ice Pick Scars?
TCA CROSS is purpose-built for icepick scars and some narrow, deep boxcar scars. Within studies using high-concentration (100%) TCA, efficacy is significantly greater for icepick scars than for boxcar scars (Comparison of 70% and 100% TCA CROSS, PubMed, 2025). It is applied point by point, scar by scar, which makes it suitable for this scar type where broad treatments cannot reach.
TCA CROSS is not a treatment for rolling/tethered scars (those are better suited to subcision) or for broad surface texture. As with all acne scarring, most people have a mix, so TCA CROSS is often one component of a combined plan.
Step by Step TCA CROSS Procedure
A small, controlled amount of high-strength TCA solution is applied directly to the opening of each icepick scar, where it causes a targeted, localised injury at the base and walls of the scar.
This focal injury activates fibroblasts in the dermis and stimulates new collagen formation. As the point heals, the new collagen raises the floor of the depressed scar toward the surface, narrows the visible opening of the scar and reduces the shadow the scar casts, improving its appearance.
As the acid is confined to the scar itself, surrounding healthy skin is largely spared.
TCA CROSS Results – What to Expect
TCA CROSS is moderately effective for atrophic acne scars: used correctly, patients may expect roughly a one- to two-grade improvement over about six months, and complete resolution is unlikely with this method alone (DermNet NZ).
You can expect to see:
- Gradual shallowing and narrowing of icepick scars across a course of treatment
- A more even skin surface as collagen rebuilds at each treated point
- Cumulative results — each session builds on the last
- Best outcomes when combined, where needed, with treatments for other scar types
Speak to our doctor
Dr Sue Ho
Aesthetic Doctor, Special Interest in Women’s Health
Lead Doctor, Women’s Health | MB BCH BAO (Ireland)
TCA CROSS is a technique-dependent treatment; the result depends heavily on the hand applying it. Dr Sue will assess whether your scars are the right type, set honest expectations, and recommend a combination approach if that would serve you better.
What Your TCA CROSS Journey Looks Like
During treatment
The skin is cleansed and prepared, and the solution is applied point by point to each scar. You may feel a brief stinging or “frosting” sensation at each point. A session typically takes 20 to 30 minutes depending on the number of scars.
After treatment
Each treated point typically forms a small dark scab or crust over the following days, which falls off naturally within about a week. Do not pick at these, as they protect the healing scar. Diligent sun protection is essential to reduce the risk of post-inflammatory pigmentation, especially in Singapore.
Results and treatment schedule
Improvement is gradual and builds over several sessions, usually spaced about 2 to 6 weeks apart to allow full healing between treatments. Multiple sessions are typically needed for icepick scars. Results are cumulative.
How Much Does TCA CROSS Cost at Prologue?
TCA CROSS starts from $250 per session. The final cost depends on the number of scars treated, how many sessions are recommended, and whether it is combined with other scar treatments. All these are discussed during your consultation before any commitment.
FAQ
What is TCA CROSS used for?
TCA CROSS targets deep, narrow icepick scars (and some narrow boxcar scars) by applying a high-strength acid to the base of each individual scar to stimulate collagen and lift the scar floor. It is one of the few techniques precise enough for this scar type, and is more effective for icepick than boxcar scars.
Does TCA CROSS hurt?
You will feel a brief sting or “frosting” sensation at each point as the solution is applied. It is short-lived and confined to each scar.
What does the skin look like afterwards?
Each treated point usually forms a small dark scab or crust that falls off naturally within about a week. It is important not to pick them, and to protect the area from the sun.
How many TCA CROSS sessions will I need?
Icepick scars usually need several sessions, with realistic improvement of around one to two grades over roughly six months; results build cumulatively
Is there a risk of pigmentation with TCA CROSS?
There can be temporary darkening at treated points, and diligent sun protection is important, particularly for medium to deeper skin tones.
Can TCA CROSS treat rolling or boxcar scars?
TCA CROSS is best for icepick scars. Rolling scars are usually better treated with subcision, and broad texture with resurfacing. Many women need a combination, which Dr Sue will map out.
Is TCA CROSS safe during pregnancy or breastfeeding?
Please disclose pregnancy or breastfeeding at consultation so Dr Sue can advise on timing.
How is TCA CROSS different from a chemical peel?
A chemical peel treats the whole skin surface at a lower concentration. TCA CROSS uses a much higher concentration applied only to the base of individual scars; it is a targeted scar technique and not a resurfacing peel.
What's the difference between TCA CROSS and microneedling for acne scars?
They treat different scar types. TCA CROSS targets deep, narrow icepick scars by applying a high-strength acid to the base of each individual scar, while microneedling works across a whole area to improve overall texture and shallower rolling or boxcar scars. They are often used together rather than chosen one over the other.