TCA CROSS for Acne Scars

TCA CROSS is a clinician-applied chemical technique that targets the base of selected depressed acne scars.

A tiny amount of trichloroacetic acid is placed precisely within an individual scar rather than spread across the whole face. The controlled injury prompts healing within that small area and can gradually soften the scar's depth. It is commonly considered for narrow, deep scars, while broad rolling scars may need a different approach.

Application can cause a brief, sharp stinging or burning sensation. A clinician may use comfort measures and works scar by scar, so the sensation is usually short-lived. Tell the clinician if you have found prior procedures difficult to tolerate; this helps them plan the visit.

When selected and performed carefully, TCA CROSS is a controlled procedure, but it is not free of risk. Acid placed outside the scar or used too aggressively can injure nearby skin. Skin tone, active acne, previous pigment changes, cold sores and scar pattern all matter during assessment.

Improvement develops as treated areas heal and remodel. Changes to a scar can remain visible after the skin has settled, but new acne or ongoing inflammation can create additional scars. A clinician may plan more than one session, spaced to allow the skin to recover and the response to be assessed.

The goal is improvement in the texture of particular scars, not an erased or perfectly even surface. The treatment is highly targeted, so it does not replace treatment for active acne. Avoid picking healing spots, as this can prolong redness and alter pigment.

A consultation can determine whether the scar shape is suitable. People seeking care for acne scars may be assessed for deep narrow depressions, skin sensitivity, tendency to darken after irritation and current acne control. Treatment may be deferred when there is an active infection, open skin, or a reason healing could be impaired.

The clinician examines and cleanses the skin, identifies scars to treat, then places a small amount of acid into each selected scar. The area may briefly turn pale at the point of application. Aftercare instructions focus on gentle cleansing, sun protection and leaving crusts undisturbed while they separate naturally.

Treated points can look pale immediately, then become red or darker and form small crusts. Keep the area clean, use the aftercare recommended for you and avoid rubbing, exfoliants or shaving directly over healing spots. Seek prompt clinical advice for increasing pain, spreading redness, pus, blisters or a reaction beyond the treated points.

Expected effects include stinging, redness and crusting. Less predictable outcomes include prolonged colour change, infection, worsening texture or an unwanted scar. Report a history of raised scars, pigment change after spots, allergies or recurrent cold sores before treatment so precautions can be discussed.

Depending on scar type, a plan may include acne control, microneedling, subcision, resurfacing procedures or combinations of treatments. A procedure is chosen by matching its action to the scar pattern rather than by using one method for every depression.

Look for a qualified dermatology or aesthetic clinician who examines your scars in person, explains why TCA CROSS fits or does not fit their shape, and provides written aftercare. Bring details of skin reactions, current medicines and previous scar treatments.