Can glycolic acid peels remove acne marks?

In recent years, a novel skincare approach—alpha hydroxy acid (AHA) chemical peeling—has gained popularity. Many people naturally wonder: Can AHA peeling effectively remove acne marks? The details are as follows:

AHA peeling is highly effective for treating red post-acne marks (erythematous marks) and hyperpigmented (brown or black) acne marks. However, it yields limited results for atrophic (depressed) acne scars or hypertrophic (raised) nodules.

Visible results from AHA peeling are not achieved after just one session; rather, treatment frequency and protocol must be tailored to the individual’s skin type and condition. Consequently, personalized AHA-based acne treatment regimens vary accordingly. Typically, a full course comprises 4–6 sessions, each lasting approximately 30 minutes, with treatments spaced roughly every 2–3 weeks. The peeling solution is formulated with varying AHA concentrations to suit individual needs. Specific recommendations should be guided by a licensed aesthetician. Generally, a complete treatment course consists of five sessions, with intervals of 7–10 days between treatments. Concurrently, patients should use prescribed home-care products under medical supervision. If a second course is required, it should be initiated approximately two months after completion of the first.

The concentration of AHA determines its depth and intensity of action on the skin. For instance, low-concentration AHAs can improve fine facial lines, soften deeper wrinkles, penetrate sebaceous glands to provide deep skin cleansing, suppress sebum production, promote epidermal cell renewal, and accelerate skin metabolism—thereby helping to treat and prevent acne.