Melasma vs pigmentation: how to tell them apart, and why it matters

"Pigmentation" is an umbrella word for any patch of skin that is darker than the skin around it. Melasma is one kind of pigmentation, alongside sun spots and the marks left after acne or irritation. They can look alike in the mirror, but they start differently and behave differently, which is why the treatment that clears one can make another worse.

This guide explains how to tell melasma from other pigmentation, why the difference matters before any treatment, and when to let a doctor decide.

Key takeaways

• Melasma is one type of pigmentationSun spots and post-inflammatory marks are the other common types, and each is managed differently.

• Pattern is the main clueMelasma forms soft-edged, symmetrical patches; sun spots are discrete spots; post-inflammatory marks sit where a spot or rash was.

• Melasma reacts to heat and hormonesIt shifts with sun, heat, pregnancy and contraception, and it tends to come back.

• Identify it before any laserThe approach that suits sun spots can aggravate melasma, so a doctor confirms the type first.

What counts as pigmentation?

Pigmentation means extra melanin, the brown pigment your skin makes, collecting in one area. On the face, three types account for most of what people notice:

• Sun spots (solar lentigines) and freckles: spots from years of sun exposure on the most exposed skin.
• Melasma: larger patches driven by UV, heat, hormones and genetics.
• Post-inflammatory hyperpigmentation (PIH): marks left behind after acne, eczema, a burn or a procedure.

All three are more common and more noticeable in the medium to deeper skin tones common in Malaysia, and all three darken with sun.

How to tell melasma from other pigmentation

A review in Dermatology and Therapy describes melasma as symmetrical facial hyperpigmentation that is more common in women and in darker skin types, with pregnancy and oral contraceptives among its recognised triggers. That symmetry is the most useful clue at home: two matching patches on both cheeks point toward melasma, while scattered spots of different sizes point away from it.

Post-inflammatory marks are the easiest to place, because they map onto something that happened. A review in the Journal of Clinical and Aesthetic Dermatology notes that these marks are more frequent and longer-lasting in skin of colour, which is why treating the acne or rash behind them comes first.

Why the difference matters for treatment

The three types are managed in different ways, which is why the right plan starts with the right name.

• Sun spots are discrete pigment that tends to respond to targeted treatment such as Pico Laser, alongside sun protection.
• Melasma is managed rather than cured. The American Academy of Dermatology notes that some treatments can irritate darker skin and make melasma darker, so plans lean on sun protection, topical care and, where suitable, conservative low-energy settings. Our guide to melasma treatment in Malaysia covers that plan in detail.
• Post-inflammatory marks usually start with treating the cause, then gentle care while they fade.

Can you have more than one type?

Yes, and it is common. Many people have melasma across the cheeks with a few sun spots on top, or post-inflammatory marks from old breakouts sitting beside a melasma patch. Each part is then handled on its own terms, often in a set order, with melasma treated most cautiously. See our pages on melasma and pigmentation for how each is approached.

When to see a doctor

Have pigmentation assessed if it is not responding to a few months of daily sunscreen and gentle care, if you are considering a laser, or if it is spreading quickly. See a doctor promptly for any dark spot that is new, changing in shape or colour, bleeding or itching, as that needs examining rather than lightening.

If you do have a laser treatment, the aftercare matters as much as the session: our guide on what to avoid after a facial laser explains why.