A mix of triggers — sun exposure is the big one, along with hormones (pregnancy, birth control pills), heat, and genetics. It's more common in medium-to-deep skin tones and in women, and often runs in families.

Is melasma permanent?

Not always. Melasma triggered by pregnancy or a medication can fade once that trigger ends. But it can also persist for years, and it's prone to coming back — which is why ongoing sun protection matters so much.

What's the most important treatment for melasma?

Daily sun protection. Because sunlight (and even heat and visible light) drives melasma, no cream or procedure works well without diligent, year-round sun protection. It's the foundation everything else builds on.

How is melasma different from other dark spots?

Melasma tends to appear as larger, symmetric patches on the cheeks, forehead, or upper lip, and is strongly tied to hormones and sun. Post-inflammatory dark spots, by contrast, appear where a specific breakout or injury was.

Melasma, Explained

If you've noticed brown or greyish patches creeping across your cheeks, forehead, or upper lip — often symmetrical, often worse after summer — you may be dealing with melasma. It's extremely common, completely harmless to your health, and genuinely stubborn. Understanding what drives it is the key to managing it without chasing miracle creams.

What melasma is

Melasma is a form of hyperpigmentation: patches where the skin makes excess pigment. According to the American Academy of Dermatology, it typically shows up as symmetric brown or grey-brown patches on sun-exposed areas of the face. It's much more common in women and in medium-to-deep skin tones, and it often runs in families.

What causes it

Melasma is driven by a combination of triggers, and usually more than one at once:

Sun exposure — the single biggest driver. UV light stimulates pigment cells, which is why melasma flares in summer and after time outdoors.
Hormones — pregnancy (the old name was "the mask of pregnancy") and oestrogen-containing birth control are common triggers.
Heat and visible light — not just UV; heat and even bright visible light can contribute.
Genetics — a strong family tendency; the AAD notes many patients have a close relative with melasma.

Why sun protection is everything

Here's the most important thing to take away: because sunlight triggers melasma, sun protection is the foundation of every effective approach. The AAD is explicit that the best results combine daily sun protection with topical treatment (and sometimes procedures). Skip the sun protection, and even the best creams underdeliver — and melasma comes roaring back.

Practical version: broad-spectrum protection every day (even cloudy days, even indoors near windows), reapplied, plus shade and hats. Tinted mineral options that also block visible light are often recommended for melasma specifically.

What helps beyond sun protection

This is general education, not a treatment plan — but the common, evidence-backed directions:

Pigment-calming topicals. Several ingredients target excess pigment. Azelaic acid is one well-studied, gentle option; niacinamide is another supportive choice. Prescription options exist for more stubborn cases.
Gentle, not aggressive. Melasma can worsen with irritation, so harsh scrubs and over-treatment can backfire.
Patience and maintenance. Melasma is a long game and prone to recurrence; consistency beats intensity.

How it differs from other dark spots

Not all pigmentation is melasma. The brown marks left specifically after a pimple or injury are post-inflammatory hyperpigmentation, which sit exactly where the original lesion was. Melasma is broader, patchier, symmetric, and hormone- and sun-linked. The distinction matters because it shapes treatment.

When to see a doctor

A dermatologist can confirm it's melasma (and not another kind of pigmentation), and prescribe stronger or combination treatments. See a professional if patches are spreading, not responding, or causing you distress. And as always — for anything new, changing, asymmetric, bleeding, or possibly skin cancer — get an in-person exam rather than self-treating.

Trying to figure out your pigmentation?

A dermatrix.life assessment can give you an informed, written read of your photos to help you tell melasma from other dark spots and decide your next step. It's informational, not a diagnosis, fully automated, and not a replacement for a professional.

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