How do I treat dark marks after acne?
Dark marks after acne are usually post-inflammatory hyperpigmentation, not structural scars, and the most important step is stopping new inflammation while treating the color. There are practical numbers for topical treatments: in a randomized trial with 60 patients who completed it, azelaic acid 20% lowered the mean pigmentation severity score from 10.47 to 7.00 over 12 weeks, while topical tranexamic acid 5% lowered it from 12.10 to 7.80; the difference between the two was not statistically significant. In a newer placebo-controlled trial, azelaic acid 15% twice daily showed meaningful improvement in post-inflammatory hyperpigmentation and redness, especially at weeks 8 and 12.
Key numbers
- 12 weeks — Length of the first clinical trial
- 10.47 → 7.00 — Pigmentation score with azelaic acid
- 12.10 → 7.80 — Pigmentation score with topical tranexamic acid
- 8–12 weeks — When the difference became clear in a newer trial
Why doesn't Dr. Yousef start with laser for every mark?
Post-inflammatory hyperpigmentation comes from earlier inflammation, and a procedure can itself cause new inflammation and more pigmentation, especially in darker skin. So he usually starts with controlling acne, sun protection and the right topical treatment, and keeps devices for selected cases rather than turning every mark into a laser session.
How do I know it is a mark and not a scar?
If the surface is flat and the problem is brown/gray color or redness, it is most likely a color mark. If there is a dip or raised area you can feel, there is a structural scar component that needs different treatment; a lightening cream does not release a tethered rolling scar.
Key takeaways
- Treat new breakouts and the color together; fading marks while new inflammation continues slows the result.
- 12 weeks is a realistic timeframe for judging a topical treatment for post-inflammatory pigmentation, rather than two weeks.
- Not every mark after acne needs a laser.
Dark and Red Marks After Acne: Pigment or Scar, and How to Fade Them Faster