Melasma: Why Brown Patches Appear on Your Face and What Actually Helps

Melasma shows up as brown or gray-brown patches, usually on the cheeks, forehead, upper lip, and nose. The patches often look the same on both sides of the face. They do not hurt, they do not itch, and they are not dangerous. They can still change how you feel about your skin, and they have a stubborn habit of coming back.

The good news is that melasma is manageable. We want to be honest about the limits, too. Most people improve with treatment, but few people clear it for good. The goal is to fade it, keep it faded, and avoid the things that wake it up.

What melasma is

Melasma is a pigment condition. Cells in your skin called melanocytes make extra melanin in certain patches. It is more common in women and in people with medium to deeper skin tones, and it often begins in the 20s to 40s. The American Academy of Dermatology describes sun exposure and hormone changes as common triggers: https://www.aad.org/public/diseases/a-z/melasma-overview

Common triggers include:

• Sun exposure, even brief and indirect
• Hormone shifts, such as pregnancy or some birth control and hormone medications
• Heat
• Skin irritation from harsh products
• A family history of melasma

You can have more than one trigger at once, which is why two people with the same patches may need different plans.

Why visible light matters

Most of us know to worry about UV rays. Newer research points to another piece. A 2026 review of the evidence describes how high-energy visible light, in the blue-violet range, can activate pigment cells in the skin and darken melasma. It also reports that people who used a sunscreen with iron oxides did better than people who used a UV-only sunscreen, with about 15% greater improvement on a standard melasma severity score: https://doi.org/10.1111/phpp.70125

This is a narrative review, not a single large trial, so we treat the exact numbers with care. The practical point holds up well, though. Sunscreen that blocks only UV leaves a gap. Tinted mineral sunscreens with iron oxides cover more of the spectrum, and that is a reasonable choice for melasma-prone skin.

The same review notes that fewer than two-thirds of people with hyperpigmentation use sunscreen at all, and few reapply. Daily protection is the habit that changes outcomes most.

First-line care: protect, then treat

A solid melasma plan has two parts.

Protect your skin every day. That means a broad-spectrum sunscreen, ideally tinted with iron oxides, applied each morning and reapplied through the day. A wide-brimmed hat helps. So does shade during peak hours. Gentle skin care helps too, since irritation can make pigment worse.

Use prescription topicals. Many people start with a topical plan that may include a skin-lightening agent, a retinoid, or a combination cream. These work slowly. Expect weeks to months, not days. We choose products based on your skin type and what else you use, and we tell you what irritation to expect so you do not give up early.

If a medication or hormone could be feeding the melasma, we look at that too. We do not stop a medication you need without a plan, and we do not guess. We go through your list and talk through options.

Tranexamic acid: promising, with caveats

Tranexamic acid was first used to reduce bleeding. Doctors noticed it also lightened melasma, and it is now used off-label for this purpose, meaning it is not FDA-approved for melasma.

The evidence is encouraging but not final. A 2024 meta-analysis of 17 randomized trials found tranexamic acid was an effective option for melasma, and that how it was delivered mattered: https://doi.org/10.1089/fpsam.2024.0187. Another review found that tranexamic acid alone worked about as well as the long-standing standard, hydroquinone: https://doi.org/10.12788/cutis.1080

Safety is the question people ask most, because tranexamic acid affects clotting. A 2025 review in the Journal of the American Academy of Dermatology found no clot events in the randomized trials it examined: https://doi.org/10.1016/j.jaad.2025.06.001. That is reassuring. It is not proof of safety in everyone. Trials are short and small, and people with a history of clots, certain clotting conditions, or some hormone use need careful screening first. Early evidence suggests it can help the right person, and we decide that together after reviewing your history.

What to expect, and when to check in

Melasma treatment is a slow process. Here is a realistic picture:

• Weeks 1 to 4: you build the sun protection habit and tolerate the new products.
• Months 2 to 3: patches often start to look lighter.
• After that: we adjust, then focus on keeping results.

Relapse is common, especially after a sunny summer or a hormone change. That does not mean the treatment failed. It means melasma is a long-term condition, and a maintenance plan is part of treatment.

Some things deserve a closer look. A dark spot that is uneven in color, has an irregular border, is growing, bleeds, or sits on only one side of the face should be examined to rule out something other than melasma. If you are not sure, send us photos. A skin check is quick and it is better to know.

Your next step

If you have brown patches that will not fade, we can help you sort out the cause and build a plan you can stick with. A telehealth visit lets us review your skin on video, go through your medications and triggers, and start treatment if it is right for you. Most major plans are accepted, including Medicare. Learn more about our medical dermatology care at /conditions/dermatology and book a visit when you are ready.