Many people use creams and serums for months trying to fade what they assume is a “mark,” without realizing the issue may actually be a structural scar that creams cannot resolve. This article explains how to tell the difference.
Post-Acne Marks
Post-acne marks are changes in skin color left behind after inflammation — either red (post-inflammatory erythema) or dark (post-inflammatory hyperpigmentation). The skin’s surface texture remains smooth; only the color has changed.
Acne Scars
Acne scars are structural changes — a loss of collagen beneath the skin that leaves the surface uneven, pitted, or depressed. This is a physical change in the skin’s architecture, not just a color change.
Why the Distinction Matters
Flat, colored marks generally respond to time, sun protection, and treatments like Pico Laser that target pigment. Pitted, structural scars need procedures that address the underlying tissue, such as Subcision or TCA CROSS. Using the wrong approach means spending time and money without addressing the actual problem.
Post-acne marks are changes in skin color — red (post-inflammatory erythema) or dark (post-inflammatory hyperpigmentation) — while the skin surface remains smooth. Acne scars involve a loss of collagen structure, leaving the skin surface uneven or pitted.
Red and dark post-acne marks often fade on their own over weeks to months, especially with consistent sun protection. If the area feels indented rather than just discolored, it is more likely a structural scar that will not resolve with time alone.
Run your finger gently over the area with your eyes closed. If the skin feels smooth, it is likely a color-related mark. If you feel a dip or depression, it is more likely a structural scar that needs a different treatment approach.
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This article is for general information only and is not a substitute for professional medical advice. Results vary by individual and should be discussed with a doctor before treatment.
This article was medically reviewed by About Skin Clinic’s doctors: Dr. Natcha Jarurungpong (Medical License No. 49624) and Dr. Withawin Paisakamas (Medical License No. 58065).
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