What Is Melasma? Causes, Triggers, and Treatment Options
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Melasma is a common skin condition that causes flat brown or gray-brown patches on the face, typically on the cheeks, forehead, upper lip, and chin. It is not harmful or cancerous, but it is chronic — meaning it can be managed with treatment but tends to return without consistent sun protection and ongoing care.
What causes melasma?
Melasma develops when melanocytes — the cells that produce skin pigment — become overactive and generate more melanin than usual. The three main triggers are UV exposure (sunlight directly stimulates melanocyte activity), hormonal changes (estrogen and progesterone sensitize melanocytes to light), and heat.
Hormonal triggers explain why melasma is so common during pregnancy, where it is sometimes called “the mask of pregnancy,” and among women taking oral contraceptives. Genetics also play a role: if a close relative has melasma, your risk is higher.
Who is most likely to get melasma?
Melasma affects an estimated 5 million people in the United States, and approximately 90% of those cases occur in women, according to two 2024 peer-reviewed reviews in the Journal of the American Academy of Dermatology (PMID 37748556) and Dermatologic Therapy (DOI 10.1155/2024/2206130).
Women with medium to dark skin tones (Fitzpatrick types III–VI) are at the highest risk. The condition most commonly appears during the reproductive years — between ages 20 and 50 — and is especially prevalent among women of Latin American, Middle Eastern, South Asian, and East Asian descent.
Is melasma permanent?
Melasma is a chronic condition, not a temporary one. It can fade significantly with treatment, but it tends to return — especially with unprotected sun exposure, hormonal changes, or a new pregnancy. Most women manage melasma long-term rather than treating it once and finishing.
The encouraging reality is that with consistent sunscreen use (SPF 30+ broad-spectrum, applied every morning), patches can stay suppressed even between treatment cycles. Sun protection is the single most important factor in preventing recurrence.
How is melasma treated?
Most over-the-counter brightening products — niacinamide, vitamin C, kojic acid — contain concentrations too low to produce meaningful improvement in melasma. Prescription treatments work at higher concentrations and can combine active ingredients in ways OTC formulas cannot legally replicate.
The most studied prescription options include:
- Hydroquinone 4% — inhibits tyrosinase, the enzyme responsible for melanin production
- Tretinoin — accelerates cell turnover and helps fade existing pigmentation
- Triple combination cream (hydroquinone + tretinoin + a mild corticosteroid) — the only US FDA-approved topical treatment for melasma, per Kania et al. 2024 in the Journal of Cosmetic Dermatology (PMID 39533523)
- Azelaic acid and tranexamic acid — effective alternatives for those who cannot use hydroquinone, including during nursing
Several telehealth platforms compound custom formulas combining these ingredients, prescribed after a brief online consultation. See our Musely review, Curology review, or Hers prescription skincare reviews, or compare Musely vs. Curology for a detailed look at the most widely used options.
Do I need to see a dermatologist for melasma?
An in-person dermatologist visit is not required to start prescription treatment. Telehealth platforms can prescribe the same medications — hydroquinone, tretinoin, compounded formulas — through a licensed online consult. That said, if you have never been formally diagnosed, or if your patches are unusual in shape, location, or behavior, an in-person visit first is worth considering to rule out other causes.
For most women who recognize melasma by its classic pattern — symmetrical brown patches on sun-exposed areas of the face — a telehealth consult is a practical and cost-effective starting point.
Frequently asked questions
Is melasma cancerous? No. Melasma is a benign pigmentation condition — it carries no cancer risk. If a pigmented patch has irregular borders, is raised, or changes rapidly, see a dermatologist to rule out other causes. Melasma patches are flat, symmetrical, and stable in shape.
Can melasma go away on its own? Sometimes. Melasma triggered by pregnancy or hormonal contraceptives may fade after delivery or stopping the pill. Most melasma is persistent, however, and will not resolve without treatment. Sun exposure during the fade-out period can re-trigger pigmentation, making daily sunscreen essential regardless of treatment status.
How long does melasma treatment take to work? Most patients see initial improvement within 4–8 weeks of consistent prescription treatment, with optimal results at 3–6 months. Because melasma is chronic, many dermatologists recommend maintaining treatment at a reduced frequency after clearing, combined with daily broad-spectrum SPF 30+ sunscreen, to prevent recurrence.
Will melasma go away after I give birth? Pregnancy-related melasma may fade in the months following delivery, but it does not always resolve completely. Sun exposure during or after pregnancy can entrench the pigmentation. If patches persist 3–4 months postpartum, a telehealth consultation for a safe prescription regimen is a reasonable next step.
Can melasma be prevented? Sun protection is the most effective prevention strategy. Daily broad-spectrum SPF 30+ sunscreen — worn every day, regardless of cloud cover — significantly reduces melasma risk and recurrence. Avoiding excess heat, wearing a wide-brimmed hat outdoors, and choosing low-estrogen or non-hormonal contraception if you are prone to melasma also help.
Bottom line
Melasma is manageable — not curable, but reliably controllable with the right treatment and consistent sun protection. Prescription formulas containing hydroquinone, tretinoin, or both are significantly more effective than anything available OTC. For most women, a telehealth consult is the fastest path to a personalized prescription without waiting months for an in-office appointment.