Melasma: Causes, Treatment, and the 2026 Dermatology Protocol
Melasma is hormone-driven facial hyperpigmentation that responds only to multi-step treatment. Here is the full 2026 protocol: topicals, oral tranexamic acid, and the laser decision tree.
Quick Answer
Melasma is a chronic, hormone-driven facial hyperpigmentation condition that responds only to layered, sustained treatment. The 2026 protocol: daily SPF 50+ mineral sunscreen with iron oxide (60-70% of the result), topical tranexamic acid 3-5% and azelaic acid 15-20% as first-line, escalating to hydroquinone 4% in 3-month courses and oral tranexamic acid 250mg twice daily for stubborn cases. Lasers are a last resort and can worsen melasma in darker skin — topicals first, always. Expect 60-80% fading over 12 weeks with adherent treatment, followed by lifelong maintenance.
What Is Melasma?
Melasma is acquired symmetric hyperpigmentation of the face, typically on the cheeks, forehead, upper lip, and chin. It's driven by overactive melanocytes responding to a triad of hormones, UV exposure, and visible light — all three are usually required for onset.
Three histological subtypes:
- Epidermal melasma — pigment in the upper skin layers; responds best to topicals
- Dermal melasma — pigment deep in the dermis; slower, more treatment-resistant
- Mixed melasma — both layers involved; the most common real-world presentation
A Wood's lamp exam helps differentiate but not perfectly — most dermatologists treat aggressively on the assumption that epidermal disease dominates and escalate only if response is poor.
What Causes Melasma?
The pathogenesis is multifactorial:
- Hormonal — pregnancy (chloasma, "mask of pregnancy"), oral contraceptives, HRT, and even luteal-phase ovulatory hormones increase melanogenesis.
- UV and visible light — both wavelengths drive melanogenesis, and visible light (blue light) is not blocked by most chemical sunscreens. This is why iron-oxide-tinted sunscreens matter.
- Heat — cooks, athletes, and people near heat sources flare; heat activates melanocytes independently of UV.
- Genetic predisposition — stronger family patterns in Fitzpatrick III-V populations.
- Pro-inflammatory states — rosacea, acne, eczema all can worsen melasma.
Identifying your drivers matters because the treatment protocol depends on whether hormonal therapy or a lifestyle change (heat exposure, contraceptive adjustment) is on the table.
The 2026 Melasma Treatment Protocol
The Kligman triple-combination (hydroquinone + tretinoin + fluocinolone) dominated melasma treatment for four decades. It still works, but the 2026 protocol has evolved to centre on tranexamic acid and azelaic acid as safer long-term options.
First line (OTC + gentle prescription)
- SPF 50+ mineral sunscreen with iron oxide — the single most important step. Iron oxide blocks visible light, which chemical and non-tinted mineral sunscreens do not. Reapply every 2 hours.
- Topical tranexamic acid 3-5% — displaces hydroquinone as the first-line topical. Non-cytotoxic, safe long-term.
- Azelaic acid 15-20% — tyrosinase inhibitor plus anti-inflammatory. Twice daily, no cycling required.
- Niacinamide 5% — reduces melanosome transfer; supports barrier.
- Vitamin C 10-15% L-ascorbic — antioxidant plus tyrosinase inhibitor; use morning only.
Second line (prescription cycling)
- Hydroquinone 4% — still gold-standard in efficacy, but used in 3-month courses with 2-3-month rest periods to avoid exogenous ochronosis.
- Kligman triple combination cream (hydroquinone + tretinoin + fluocinolone) — the original formula; aggressive, short courses only.
- Cysteamine 5% — newer agent; displaces melanin precursors; smelly but effective.
- Thiamidol (isobutylamido thiazolyl resorcinol) — strong tyrosinase inhibitor; used in Eucerin Anti-Pigment line.
- Topical retinoids (tretinoin 0.025-0.05%) — adjunct for enhanced penetration and mild anti-pigmentary effect.
Third line (oral therapy)
- Oral tranexamic acid 250mg twice daily — the major advance of the last decade. Use only after VTE (venous thromboembolism) screening. Contraindicated in smokers, hormonal-contraceptive users with risk factors, and patients with clot history.
- Oral glutathione — weaker evidence; variable effect.
Fourth line (devices — cautious use)
- Q-switched Nd:YAG — for refractory dermal melasma; mixed data, rebound risk.
- PicoSure, Picoway — picosecond lasers; operator-dependent outcomes.
- Fractional non-ablative lasers — high rebound risk; most dermatologists avoid.
- IPL — works for some patients but flares risk in Fitzpatrick IV+.
- Chemical peels — glycolic 20-35%, Jessner's, TCA 10-15% — supplementary, not primary therapy.
Always start topicals before lasers. Laser-first approaches worsen melasma in >30% of darker-skinned patients.
Sunscreen for Melasma — The Non-Negotiable
Sun protection is 60-70% of your melasma result. Specifically:
- SPF 50+ mineral (zinc + titanium) with iron oxide tinting — iron oxide blocks visible light
- Reapplication every 2 hours outdoors and every 4 hours indoors near a window
- Separate SPF reapplication spray for touch-ups over makeup
- Sun-protective hats, not just sunscreen, during peak hours
Best iron-oxide sunscreens for melasma:
- EltaMD UV Clear Tinted SPF 46
- ISDIN Eryfotona Actinica
- Colorescience Sunforgettable Total Protection Brush-On SPF 50
- La Roche-Posay Anthelios Mineral Tinted SPF 50
Melasma During Pregnancy (Chloasma)
Hydroquinone, tretinoin, and oral tranexamic acid are contraindicated during pregnancy and breastfeeding. Safe options:
- Azelaic acid 15-20% (pregnancy Category B)
- Topical vitamin C
- Niacinamide
- Iron-oxide mineral sunscreen
- Sun avoidance
Aggressive treatment can resume 6-8 weeks postpartum and after breastfeeding ends. Many cases fade spontaneously postpartum; some persist and need treatment.
Will Melasma Come Back?
Yes, without maintenance. Melasma is a chronic relapsing condition — clearance is achievable, but untreated it recurs with any new UV, hormonal, or heat trigger. Plan on:
- Active treatment phase: 8-16 weeks of tranexamic acid + azelaic acid + strict SPF
- Maintenance phase: topical tranexamic acid or cysteamine + daily SPF 50 + iron oxide indefinitely
Without maintenance, rebound within 3-12 months is typical.
When to See a Dermatologist
- Failure of 8-week OTC regimen (SPF + azelaic acid)
- Concern about differential diagnosis (lentigines, post-inflammatory hyperpigmentation, ashy dermatosis)
- Considering oral tranexamic acid (requires VTE risk screening)
- Considering laser (always with a specialist familiar with Fitzpatrick-stratified protocols)
Frequently Asked Questions
What is the best treatment for melasma?
The best treatment for melasma is layered: daily SPF 50+ mineral sunscreen with iron oxide (60-70% of the result), plus topical tranexamic acid 3-5% and azelaic acid 15-20% as first-line. Escalate to hydroquinone 4% in 3-month courses and oral tranexamic acid 250mg twice daily for stubborn cases. Lasers are a last resort — they can worsen melasma in darker skin.
Can melasma be cured permanently?
No — melasma is a chronic relapsing condition. Clearance is achievable, but without lifelong maintenance (SPF 50+, iron oxide sunscreen, plus topical tranexamic acid or cysteamine) it recurs. Expect 60-80% fading over 12 weeks with adherent treatment, then a maintenance routine indefinitely.
Is melasma caused by hormones?
Hormones are one of the strongest melasma triggers — pregnancy (chloasma), oral contraceptives, and HRT all increase melanogenesis. But melasma requires both hormonal predisposition AND UV/visible-light exposure. Hormonal management alone rarely clears melasma; UV management is equally important regardless of hormonal status.
Is hydroquinone still safe for melasma?
Yes, in 3-month courses with 2-3-month rest periods. Continuous hydroquinone use raises the risk of exogenous ochronosis (paradoxical darkening), which is why modern protocols cycle it or replace it with tranexamic acid. For moderate-severe melasma, short hydroquinone 4% courses remain highly effective — just not the everyday maintenance option they were treated as in the 1990s.
Bottom Line
Melasma is a chronic condition, not an acute problem. Beat it by treating sun and visible light seriously (iron-oxide mineral SPF 50+, reapplied), using tranexamic acid and azelaic acid as your daily topicals, cycling hydroquinone only when needed, and resorting to lasers only after topicals have failed. Plan for lifelong maintenance — stopping treatment reliably brings the pigment back.
