How to Treat Melasma: A Clinical Answer to a Stubborn Problem
Melasma is stubborn. People spend years cycling through brightening serums, vitamin C products, and niacinamide treatments with limited results — not because they're doing it wrong, but because the products they're using weren't designed to address what melasma actually is.
This post covers what melasma is at a biological level, why most OTC treatments underperform, what prescription treatment looks like, and what realistic expectations for improvement should be.
What melasma actually is
Melasma is a chronic hyperpigmentation condition caused by overactive melanocytes — the pigment-producing cells in the skin. Under normal circumstances, melanocytes produce melanin in response to UV exposure or other signals. In melasma, these cells become dysregulated, producing excess melanin in response to triggers that include UV light, hormonal fluctuations, heat, and inflammation.
The result is patches of darker pigmentation, typically symmetric, most commonly on the cheeks, forehead, upper lip, and chin. It's more prevalent in women, more common in medium to darker skin tones, and frequently triggered by pregnancy, hormonal contraceptives, or perimenopause.
The biological complexity of melasma is what makes it difficult to treat:
It's not purely surface pigmentation. In epidermal melasma, the excess melanin is primarily in the epidermis (the upper skin layers) and responds better to treatment. In dermal melasma, pigment has migrated deeper into the dermis, making it significantly more resistant. Many patients have mixed (epidermal and dermal) melasma.
The melanocytes remain overactive. Even when existing pigmentation fades, the underlying trigger remains. Without ongoing management — particularly sun protection — melasma returns.
It's hormonally influenced. In hormonally driven melasma, systemic factors (estrogen, progesterone, androgens) continue to stimulate melanocyte activity. Topical treatment alone can't fully override a systemic hormonal signal, which is why melasma associated with pregnancy or hormonal contraceptives is particularly persistent.
Why OTC brightening products don't work well for melasma
Over-the-counter brightening products — vitamin C serums, niacinamide, kojic acid, alpha arbutin — contain real, evidence-backed ingredients. They work to varying degrees. But they face two fundamental limitations when it comes to melasma:
Concentration. OTC formulations are made for safe unsupervised use, which means actives are present at concentrations significantly below what clinical research has shown to be most effective. The niacinamide in a retail serum and niacinamide in a prescription-concentration compounded formula are not interchangeable.
Mechanism. Most OTC brighteners work primarily by fading existing surface pigmentation — they address the result rather than the process generating new pigment. For melasma, interrupting melanin production upstream is what creates durable improvement, not just fading what's already there.
What actually treats melasma: the prescription approach
Effective melasma treatment targets the condition through multiple mechanisms simultaneously. A clinician-designed protocol typically involves:
Prescription retinoid (tretinoin)
The foundation of most effective melasma protocols. Tretinoin accelerates epidermal cell turnover — shedding pigmented cells faster and improving the penetration of other actives. It also has direct effects on melanin transfer between melanocytes and keratinocytes. It rarely works alone for melasma but significantly enhances the efficacy of everything used alongside it.
Melanocyte-inhibiting actives
These interrupt melanin synthesis at the enzymatic level, reducing the production of new pigment:
Tranexamic acid — increasingly the preferred first-line active for melasma, particularly in medium and darker skin tones. Works by blocking plasminogen-dependent UV signal pathways that stimulate melanin production. Excellent tolerability profile.
Azelaic acid — inhibits tyrosinase (the enzyme central to melanin synthesis) while reducing inflammation. Dual mechanism makes it particularly effective for melasma combined with post-inflammatory hyperpigmentation.
Kojic acid — a naturally derived tyrosinase inhibitor often used in combination protocols to broaden the mechanism of action.
Hydroquinone — the gold-standard prescription depigmenting agent where appropriate. Highly effective but used in structured cycles under clinician supervision. Best suited for more severe presentations, used carefully in darker skin tones.
Sun protection — non-negotiable
UV exposure is the primary ongoing trigger for melanocyte overactivation. Every clinician treating melasma will tell you the same thing: without daily SPF use, treatment will underperform. This is not a suggestion. Mineral sunscreen (zinc oxide, titanium dioxide), SPF 30 minimum, every day regardless of weather.
How to treat hormonal melasma
Hormonally driven melasma — related to pregnancy, hormonal contraceptives, or perimenopause — is the most clinically complex presentation because a systemic trigger is continuously stimulating melanocyte activity.
For pregnancy-related melasma: many actives (tretinoin, hydroquinone) are contraindicated during pregnancy and breastfeeding. Treatment typically begins postpartum. Hormonal melasma sometimes improves on its own after delivery, though it often persists and benefits from treatment.
For contraceptive-related melasma: if melasma appeared or worsened after starting hormonal contraception, discussing contraceptive options with your prescriber may be relevant. This doesn't mean treatment can't proceed in parallel — it means the full clinical picture is part of the assessment.
For perimenopausal melasma: hormonal fluctuations during perimenopause can trigger or worsen melasma. Prescription treatment can be effective, though the hormonal context is factored into clinical decision-making.
How to treat melasma on different skin tones
Melasma treatment is not one-size-fits-all across skin tones. Certain actives that are appropriate for lighter skin tones carry risks in darker skin — the primary concern being post-inflammatory hyperpigmentation (PIH), where irritation triggers new pigmentation that can be harder to treat than the original melasma.
For medium and darker skin tones (Fitzpatrick types IV–VI), the preferred approach typically prioritizes tranexamic acid and azelaic acid as first-line actives, with hydroquinone used more cautiously and at lower concentrations. Starting with lower tretinoin concentrations and titrating carefully is important to minimize irritation-triggered PIH.
A clinician who understands this nuance is essential. A well-designed prescription protocol accounts for your skin tone from the outset — selecting actives and concentrations appropriate for your specific presentation.
Realistic expectations for melasma treatment
Melasma is one of the slower-responding pigmentation conditions. Managing expectations is part of the clinical job:
Epidermal melasma responds meaningfully within 3–4 months of consistent treatment with the right protocol. Improvement is gradual and progressive.
Dermal or mixed melasma responds more slowly — 6–12 months for meaningful improvement, and results may plateau. Some forms of dermal melasma are highly resistant to topical treatment alone.
Recurrence is possible. Even successfully treated melasma can return with significant UV exposure or hormonal change. Ongoing maintenance — continued SPF use, periodic use of active treatments — is part of long-term management.
The goal of prescription treatment is meaningful, clinically significant improvement — not necessarily a complete elimination of all pigmentation in all cases. Your clinician sets expectations specific to your melasma type during the assessment.
Can melasma be treated permanently?
"Permanently" is a word to use carefully with melasma. The melanocytes that produced the excess pigment remain in the skin — they can be brought back into normal regulation, but they can be re-triggered by the same factors (UV, hormones, heat) that activated them in the first place.
What's achievable with consistent prescription treatment and sun protection: significant, sustained reduction in pigmentation, with ongoing maintenance preventing recurrence. Most patients on a proper protocol maintain significantly improved skin tone as long as they remain consistent with SPF and appropriate treatment.
Getting prescription melasma treatment in Canada
You don't need a dermatologist referral to access prescription melasma treatment in Canada. An online assessment with a licensed Canadian medical professional is the most practical route for most patients.
At Laevo, the assessment covers your skin tone, melasma type and location, history with previous treatments, hormonal context, and any relevant health information. Your clinician selects the combination of actives appropriate for your specific presentation — not a generic brightening formula, but a prescription designed for your melasma.
Assessment fee applies. Prescription required — not all applicants will be approved. Melasma treatment timelines vary by melasma type, depth, and consistency of treatment. Sun protection is an essential part of any melasma treatment protocol. Individual results vary. This article is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any prescription treatment.
