Melasma in San Diego: What Causes It, Why It Comes Back, and What Finally Works

Melasma is one of the most frustrating skin conditions I treat. Patients often call it their "invisible scar" — it's not painful or dangerous, but it profoundly affects confidence. What makes melasma especially maddening is that it's relentless: treat it, and it often comes back. Understanding why is the first step to controlling it long-term.

What Exactly Is Melasma?

Melasma is a chronic disorder of hyperpigmentation — uneven, symmetric dark patches, typically on the cheeks, bridge of nose, forehead, chin, and upper lip. It's caused by melanocytes (pigment-producing cells) becoming overactive and producing excessive amounts of melanin.

It's far more common in women (90% of cases), people with darker skin tones (Fitzpatrick III–VI), and those with genetic predisposition. In the US, it's most prevalent in Latina, Asian, Middle Eastern, and African American populations.

What Causes Melasma?

Melasma is multifactorial. It requires both genetic predisposition and triggering factors:

Primary Triggers:

• UV exposure (the biggest driver): Even brief, incidental sun exposure can maintain or worsen melasma. This is why melasma is more common in sunny climates and worsens seasonally.
• Hormonal factors (especially in women): Oral contraceptives and hormone replacement therapy are major triggers. Many women develop or worsen melasma within months of starting birth control.
• Heat: Direct heat (from ovens, saunas, intense exercise) can trigger or worsen melasma through unknown mechanisms (possibly increased vascular dilation triggering melanocyte activity).
• Certain medications: Anticonvulsants (phenytoin), antimalarials (quinine), and minocycline can trigger drug-induced melasma.
• Genetic predisposition: If your parents or siblings have melasma, your risk is high.
• Inflammation: Any inflammatory skin condition (rosacea, dermatitis, post-procedure) can trigger melasma in predisposed individuals.

Why Melasma Keeps Coming Back

This is the core frustration: treating melasma is not a "cure." It's management. The underlying drivers (sun exposure, hormones, genetics) don't go away. Without strict prevention, melasma recurs in most patients within 6–12 months of treatment.

This is why maintenance and prevention are as important as active treatment.

Evidence-Based Melasma Treatments

First-Line Topical Treatments:

• Hydroquinone (4–5%): The gold standard depigmenting agent. Inhibits tyrosinase, the enzyme responsible for melanin synthesis. Results visible in 4–8 weeks. Used cyclically: 3–4 months on, 1–2 months off (to avoid ochronosis — paradoxical darkening from prolonged use).
• Tretinoin: Increases cell turnover, accelerates clearance of existing pigment. Often combined with hydroquinone for synergistic effect.
• Combination creams (Kligman's formula): Hydroquinone 5% + tretinoin 0.1% + fluocinolone acetonide 0.4%. This triple combination is highly effective and is standard of care in many clinics.
• Azelaic acid (15–20%): Inhibits melanin production and has anti-inflammatory properties. Gentler than hydroquinone; good option if hydroquinone is irritating or unavailable.

In-Office Treatments:

• Chemical peels: Superficial peels (glycolic, lactic acid) require a series of 6–12 treatments but are safe across all skin tones. Medium-depth peels (TCA) can be effective but carry higher hyperpigmentation risk in darker skin.
• Laser and IPL treatments: Q-switched lasers, fractional lasers, and IPL can reduce melasma, but results are variable and hyperpigmentation risk is real, especially in Fitzpatrick IV–VI. Typically requires 3–5 sessions.

Hormonal Approaches (when applicable):

• For women, discontinuing estrogen-based oral contraceptives or HRT can slow or stop melasma progression, though improvement is often gradual (months to years).

Critical: Sun Protection (Non-Negotiable)

SPF 50+ is not optional — it's foundational. UV exposure is the biggest driver of melasma. Without strict sun protection, all other treatments fail and melasma recurs.

• Use a broad-spectrum SPF 50+ daily (even on cloudy days and indoors if near windows)
• Reapply every 2 hours if outdoors
• Wear a wide-brimmed hat and sunglasses when possible
• Consider UV-protective clothing for sun exposure

The Most Effective Protocol (What Works in My Practice)

For most moderate-to-severe melasma:

1. Start with Kligman's formula or hydroquinone 4%: Apply nightly for 12 weeks, then reassess. Most patients see 40–60% improvement.
2. Add a series of superficial chemical peels: Monthly glycolic or lactic acid peels accelerate improvement (results visible within 2–3 peels).
3. For stubborn melasma: Consider fractional laser at low to moderate settings, done cautiously in darker skin tones.
4. Maintenance indefinitely: Once improvement is achieved, transition to maintenance hydroquinone (2–3x weekly) or periodic peels, combined with religious sun protection.

Why Melasma Relapse Happens and How to Prevent It

• Stopping sun protection: Even a "break" from SPF causes relapse. Year-round protection is required.
• Continuing estrogen: If melasma was triggered by birth control, staying on it means ongoing stimulus for recurrence.
• Stopping maintenance treatments: Hydroquinone and peels address active pigmentation, but the underlying propensity to produce excessive melanin remains. Maintenance prevents relapse.
• Heat exposure: Avoiding excessive heat (saunas, intense workouts in heat, steam) may help prevent recurrence.

Realistic Timeline and Expectations

• Month 1–2: Subtle fading, especially of the edges of dark patches
• Month 2–3: 30–50% improvement with topicals alone
• Month 3–4: 50–70% improvement with topicals + peels
• Month 4–6: Continued gradual improvement; full results typically at 6 months
• Ongoing: Without maintenance, expect 25–50% relapse within 12 months

Frequently Asked Questions

Q: Is melasma permanent?
A: It's chronic and prone to relapse, but treatable. Think of it like hypertension: you manage it with ongoing treatment and lifestyle modification, not cure it.

Q: Can men get melasma?
A: Yes, though it's much rarer (10% of cases). Men with melasma often have intense sun exposure (outdoor occupations) or are taking triggering medications.

Q: Is there a natural or "safe" alternative to hydroquinone?
A: Azelaic acid is gentler. Niacinamide, vitamin C, and kojic acid have mild depigmenting effects. But they're significantly less effective than hydroquinone. For meaningful improvement, prescription-strength hydroquinone or topicals are standard of care.

Q: Why does melasma seem worse in summer?
A: UV exposure is a major trigger. Even with sun protection, reflective UV (bouncing off water, concrete, sand) can maintain melasma. This is why melasma flares seasonally in summer.

Schedule a melasma consultation at SOM Aesthetics in Encinitas →