- Melasma is symmetrical, patchy and hormone-linked. Post-acne marks sit exactly where a lesion was.
- The distinction decides whether treatment should be active or protective.
This page answers one question in depth. For the complete picture, start with Pigmentation.
Four questions that usually settle it
- Is it symmetrical on both cheeks with a similar shape? That pattern favours melasma.
- Can you match each mark to a spot you remember? That favours post-inflammatory marks.
- Did it begin during pregnancy, after starting contraception, or in your thirties? Melasma.
- Does it worsen in summer and settle in winter? Both do, but melasma does so dramatically.
Flat brown marks left by acne or injury. Usually fades with sun protection and time.
Uneven tan and dull patches on exposed areas. Prevention-led.
Symmetrical patches on cheeks and upper lip. Chronic and relapsing — managed, not cured.
Greyish-brown, sits deeper. Slowest to respond; aggressive treatment can worsen it.
Why misdiagnosis is costly
Post-acne marks tolerate a fairly active approach — gentle exfoliation, retinoids and time all help. Melasma does not. The same protocol that fades a post-acne mark in three months can drive melasma into a rebound that takes a year to settle.
This is the single most common reason people arrive at a clinic with pigmentation worse than when they started self-treating.
What to do next either way
Both benefit from disciplined photoprotection, so start there while you get an assessment. Photograph the area in daylight once a fortnight, in the same spot, so change is measurable rather than remembered.
Frequently asked questions
Can I have both at once?+
Frequently, yes — melasma across the cheeks with post-acne marks along the jaw. Each part is treated on its own terms.
Does a Wood's lamp examination help?+
It helps estimate pigment depth, which guides how conservative the plan needs to be.
Key takeaways
- Pattern and history separate the two more reliably than colour
- Melasma needs restraint; post-acne marks need protection and patience
- Photograph fortnightly in daylight to track real change
References
- Nayami Cosmyc medical disclaimer
- Indian Association of Dermatologists, Venereologists and Leprologists — patient guidance
Sumaiya is the founder of Nayami Cosmyc in Mumbai, where she runs both the clinic and the academy. She works across skin, hair, hijama and clinical nutrition, and writes the Knowledge Hub so patients can understand a treatment properly before they ever book one.
Author profile and articlesReaders who have finished this guide and want melasma vs post-acne marks assessed in person can read about the related services at Nayami Cosmyc. There is no obligation to book — the guide above stands on its own.
Still unsure what applies to you?
A short assessment is usually faster than another month of reading. Kurla, Mumbai — online consultations available.