Melasma Treatment in Houston: Why Climate Makes It Harder

‍This article is educational and does not replace an evaluation by a board-certified dermatologist. If you have a concerning skin change, please book a visit.

Melasma is hard to treat anywhere. In Houston it is harder, because the two things that make melasma worse, ultraviolet radiation and heat, are the baseline weather here nine months a year. If you have been chasing melasma with cream after cream and watching it return every summer, the problem is usually not the cream. It is the environment the cream is trying to hold back, and a plan that is not calibrated for it. This guide explains what melasma actually is, why Houston is particularly challenging, and the evidence-based treatment stack dermatologists use to bring it down and keep it down.

What melasma actually is

Melasma is a chronic disorder of pigmentation. It shows up most often on the cheeks, forehead, upper lip, and chin, in roughly symmetric brown or gray-brown patches. Two things drive it: melanocytes (the pigment-producing cells in the skin) become hyperactive, and the supporting environment of the skin (surrounding vasculature, inflammatory signaling, melanin transfer) reinforces that hyperactivity. Hormonal shifts, genetics, ultraviolet radiation, visible light, heat, and certain medications can all act as triggers (AAD, 2024).

The single most important fact about melasma is that it is not a stain that can be washed away. It is a condition that can be controlled, lightened, and sometimes cleared, but it tends to recur when the stimulus comes back. "Cure" is not a word dermatologists use for melasma. "Control" and "maintenance" are.

Why Houston makes melasma harder

No Houston dermatology practice we have seen writes climate-specific melasma content in any real depth. That is a problem, because Houston's climate is the differentiator that changes how aggressive and how ongoing your plan needs to be.

UV index, year-round

The National Weather Service Houston/Galveston office records a summer UV index that routinely sits between 10 and 11 (classified as "extreme"), and a UV index that does not fall below 3 ("moderate") in any month of the year. Compare that to northern U.S. cities where winter UV can drop near zero. In Houston, UV exposure is a daily driver of melasma activity, not a seasonal one.

Humidity and heat

Average relative humidity in Houston sits close to 75% annually (NOAA Houston). Heat elevates skin surface temperature, which can increase cutaneous vasodilation and inflammatory signaling. In some patients, heat alone can drive a flare without a major UV increase. "Heat as a melasma trigger" is real and under-discussed in patient conversations.

Visible light (the missed piece)

Most sunscreens protect against UV. Visible light, the spectrum you can actually see, passes through standard SPF filters largely unimpeded. Research has shown that visible light, particularly high-energy blue violet light, induces significant pigmentation in Fitzpatrick III-VI skin types even with UV blocked (Mahmoud et al., Journal of Investigative Dermatology, 2010; Passeron and Picardo, Pigment Cell Melanoma Res., 2018). In a city as demographically diverse as Houston, this is not a marginal detail. It is often the missing element in a melasma plan that has plateaued.

Treatment decisions depend on your individual skin, medical history, and goals. The information below describes how dermatologists evaluate options; it is not a prescription or a recommendation for any specific person.

The evidence-based treatment stack

Dermatologists treat melasma in tiers, not in one move. The right combination depends on how long the melasma has been active, how it has responded to prior treatment, your Fitzpatrick skin type, and your tolerance for maintenance.

Tier 1: Strict sun and visible-light protection

This is the tier that makes or breaks every other layer. It includes:

• A tinted mineral sunscreen that contains iron oxides, applied every morning and reapplied during any extended outdoor exposure. Iron oxides are the ingredient with published evidence for visible-light blocking (Lyons et al., JAAD, 2021).
• Wide-brim hats and UPF-rated clothing during outdoor time.
• UV films on car side and rear windows, which can meaningfully reduce cumulative UV exposure during commutes.
• An honest conversation with yourself about any "sun-seeking" habits, since beach and pool exposure will undo topical work.

If a patient is not willing to commit to daily tinted mineral sunscreen, the rest of the stack rarely works.

Tier 2: Topicals

Topical therapy is the foundation of most treatment plans. The evidence-based options used alone or in combination include:

• Hydroquinone 4%, commonly as part of a triple-combination cream (hydroquinone, tretinoin, a topical corticosteroid). This combination has the largest evidence base for initial clearance (AAD, 2024). It is used for a defined course, typically not indefinitely, with planned off-periods to reduce risk of exogenous ochronosis or irritation.
• Azelaic acid 15 to 20%, a well-tolerated tyrosinase inhibitor, useful as a primary or maintenance topical. Safe in pregnancy, which matters for a condition frequently triggered by pregnancy.
• Topical tranexamic acid, typically at 2 to 5%, which acts on plasmin-mediated melanin stimulation.
• Cysteamine cream, an antioxidant pigment-reducing agent with growing evidence as a hydroquinone alternative or maintenance option.

Tier 3: Oral tranexamic acid

For persistent or refractory melasma, low-dose oral tranexamic acid has become a standard adjunct. A 2023 systematic review and meta-analysis in JAMA Dermatology reported significant melasma severity reductions with oral tranexamic acid, typically at doses of 250 mg twice daily for 8 to 12 weeks (cited in JAMA Dermatology, 2023).

It is not for everyone. Oral tranexamic acid is contraindicated in patients with a personal or family history of thromboembolic disease, active smoking with concurrent estrogen use, pregnancy, certain clotting disorders, and several cardiovascular conditions. A dermatologist screens for these before prescribing and, in many cases, coordinates with the patient's primary care provider.

Tier 4: Procedures

Procedural options are added to topicals, not used instead of them, and device selection matters more in melasma than in almost any other pigmentary condition.

• Non-ablative fractional lasers at conservative settings and low-fluence Q-switched 1064 nm lasers are the most supported device approaches. They can improve melasma when paired with strict photoprotection and topicals.
• Chemical peels (glycolic acid, salicylic acid, Jessner's, and modified Kligman-type peels) can help, particularly as maintenance. Read more on our chemical peels page.
• Radiofrequency microneedling has emerging evidence in melasma, with the advantage that it does not primarily rely on pigment-targeting energy. See our microneedling page for how we use it.

More on laser options generally is available on our laser treatments page. The key discipline is that device choice for melasma in Houston, with our skin-type diversity, is not a commodity decision. It should be made by a dermatologist experienced with melasma in your specific skin type.

What to avoid

Several popular treatments can make melasma worse, particularly in patients with Fitzpatrick skin types IV through VI (the skin tones common across a large share of our Houston patient base).

• Aggressive IPL (intense pulsed light). IPL can trigger post-inflammatory hyperpigmentation and paradoxical darkening of melasma, with the risk rising substantially in darker skin types.
• Ablative fractional CO2 laser without experienced hands. The heat and disruption can worsen pigmentation.
• High-strength peels performed without appropriate priming. Irritation drives pigment in melasma patients; gentleness is the rule.
• DIY pigment "hacks" (strong over-the-counter acids, unverified "skin-whitening" products ordered online). Many contain unregulated steroids or mercury and can leave long-lasting damage.

Realistic maintenance: the next 12 months

A realistic melasma plan looks less like a sprint and more like a seasonal rhythm. A typical 12-month arc in a Houston patient:

• Months 1 to 3. Start tinted mineral sunscreen with iron oxides, begin topical therapy (often a triple combination for a defined course), assess response at 8 to 12 weeks.
• Months 3 to 6. Transition to a maintenance topical (azelaic acid, cysteamine, topical tranexamic acid, or an alternating regimen). Consider oral tranexamic acid if severity and risk profile allow. Add a carefully chosen procedure if appropriate.
• Months 6 to 12. Maintain photoprotection aggressively through summer, when Houston melasma classically flares. Re-evaluate in early fall.
• Year 2 and beyond. Maintenance topical plus strict photoprotection, with short courses of stronger topicals as needed after summer flares.

Response varies by patient. Some clear well and need only maintenance. Some require a more layered approach. All benefit from a dermatologist who is tracking the plan over time.

When to see a dermatologist

Consider an evaluation if your melasma has plateaued on over-the-counter products, if you have never had photoprotection evaluated for visible light (not just UV), if you are considering a laser or IPL procedure, if you have Fitzpatrick IV-VI skin and want device options chosen carefully, or if you are in a life phase (pregnancy, postpartum, hormonal transition) that typically triggers a flare. More on how we evaluate and treat melasma is available on our melasma clinical page.

Frequently Asked Questions

Why does my melasma keep coming back?

Melasma is a chronic condition, not a stain. The melanocytes responsible for the pigment remain sensitized to UV, visible light, heat, and hormonal triggers. Without ongoing sun and visible-light protection and, for many patients, a maintenance topical, the pigment returns. Recurrence is the rule, not the exception, particularly in Houston's climate.

What is the strongest topical treatment for melasma?

Hydroquinone 4%, often in a triple combination with tretinoin and a topical corticosteroid, has the largest evidence base for initial clearance. It is typically used for a defined period rather than indefinitely. Azelaic acid, topical tranexamic acid, and cysteamine are hydroquinone alternatives or complements, particularly for patients sensitive to hydroquinone or those in maintenance.

Does oral tranexamic acid actually work for melasma?

Evidence from multiple randomized and observational studies supports low-dose oral tranexamic acid (often 250 mg twice daily) as a useful adjunct for refractory melasma in appropriately screened patients. It is contraindicated in patients with a personal or family history of thromboembolic disease, certain cardiovascular conditions, active smokers on estrogen, and others. Screening by a dermatologist is required.

Can a laser cure melasma?

No treatment cures melasma. Carefully selected non-ablative fractional lasers, low-fluence Q-switched lasers, and radiofrequency microneedling can improve appearance when combined with strict photoprotection and topicals. Aggressive IPL and ablative fractional lasers carry real risk of worsening pigment, particularly in Fitzpatrick IV-VI skin. Device choice should be made by a dermatologist experienced with melasma in your skin type.

How should I protect my skin from visible light in Houston?

Standard SPF filters block UV but largely do not block visible light. Tinted mineral sunscreens that contain iron oxides are the most evidence-supported way to reduce visible-light exposure on facial skin. Wide-brim hats, sun-protective clothing, and car-window UV films add protection. In Houston, this protection matters every month of the year.

Melasma is a marathon, not a sprint, and Houston's climate is not a neutral course. The patients who do best combine disciplined photoprotection (including visible light), a topical regimen matched to their skin, the right procedure chosen conservatively, and a dermatologist who adjusts the plan as the seasons change. If you would like an evaluation, book a melasma consultation at Bayou City Dermatology.