Why does my melasma keep coming back?

Most people I see with melasma have already done something about it. A course of laser, a few peels, a serum a friend swore by. It faded, and then one summer later it was back, sometimes darker than before. The usual conclusion is that the treatment failed, or that they did.

Neither is quite right. Melasma behaves less like a stain and more like a thermostat that has been set a little too high. You can clear the room, but unless you change the setting, the pigment returns. Understanding why is the most useful thing you can take into any treatment decision.

What melasma actually is

Melasma is patchy, symmetrical brown pigmentation, usually across the cheeks, forehead, upper lip or jawline. It is most common in women between 20 and 40, and in skin that tans easily: many of my patients have Asian, South Asian, Middle Eastern, Mediterranean or Latin heritage.

A sun spot is a local event. One patch of skin has had too much sun, and that spot holds more pigment. Melasma is a regional pattern. The pigment-producing cells across a whole area are more active than they should be, and they respond to triggers that barely affect other people’s skin.

It is also not only a surface problem. Under the microscope, melasma skin shows more pigment in the deeper layer (the dermis), more small blood vessels, and signs of long-term sun damage to the supporting tissue (DermNet). That deeper layer talks to the pigment cells above it. It is one reason treatment aimed only at the surface tends to be temporary.

There is often a family pattern too. Around 60 percent of people with melasma report a relative who has it. Understanding your triggers and finding a manageable maintenance routine can help you care for your skin over time.

Five reasons melasma comes back

Relapse is rarely one thing. It is usually two or three of the following, working together.

1. Light, and not only UV

UV is the obvious trigger. Less well known is visible light, the ordinary daylight that passes straight through most sunscreens. It can deepen melasma, particularly in darker skin (American Academy of Dermatology). A sunscreen can be SPF 50 and still leave melasma skin exposed. This is why a sunny week in December so often undoes months of progress.

2. Heat

Many people notice flares after saunas, hot yoga, long runs in summer or standing over a stove. Heat is a commonly reported trigger, and it is easy to overlook because it has nothing to do with sunburn.

3. Hormones

Pregnancy, hormonal contraception and hormone therapy are linked to melasma in roughly a quarter of cases (DermNet). If the hormonal influence continues, so does the stimulus. This is a conversation for your doctor, not a reason to change medication on your own. Hormonal shifts later in life can also change how skin behaves; our guide to skin changes during menopause covers the wider picture.

4. Irritation

Inflamed skin makes pigment. Products that sting, over-exfoliation and aggressive treatments can all nudge melasma darker. A routine built to fade pigment can become the thing that feeds it.

5. Stopping

When patches fade, it is understandable to ease back on your routine. Melasma can return when protection or maintenance changes. A simpler, sustainable plan can help you keep caring for your skin even when it looks clearer.

Where laser fits in a melasma plan

Laser and light treatments can lift visible pigment, and in the right hands they have a place. On their own, they treat the result rather than the cause.

Melasma skin is reactive. Energy-based treatments that heat or inflame it can trigger more pigment, either as rebound melasma or as darker marks after inflammation.

DermNet notes that lasers and IPL carry a high risk of relapse and of the melasma becoming harder to treat. I see this most often in people who were treated as though melasma were a collection of sun spots. If you are weighing up devices, our guide to Pico or IPL for pigmentation explains why the diagnosis matters more than the machine.

A procedure can be a useful part of a melasma plan when it suits your skin. We consider preparation, settings, recovery and ongoing care together, then review your response. Melasma can recur, so the aim is improvement supported by a practical maintenance plan.

What keeps melasma quieter

The goal is not a single clearance. It is fewer, milder flares, and skin that stays calm between them. That comes from a few unglamorous habits, done consistently.

Protection that covers visible light

A broad-spectrum SPF 50+ sunscreen with iron oxides, which is what gives a sunscreen its tint, every day and all year. Reapplied when you are outdoors. A wide-brimmed hat does more than most serums. In Sydney, winter counts.

A calm routine

Fewer products, not more. Anything that stings or leaves your skin red is working against you. Pigment-regulating ingredients have a place, but they only help skin that is not constantly inflamed.

Knowing your triggers

Heat, hormones, a new product, a holiday. Keeping a rough note of when flares happen often reveals a pattern that a single appointment would miss.

Planning around the seasons

More active treatment is usually better timed for the cooler months, with summer used for protection and maintenance. Your practitioner can help time any procedures around your sun exposure, travel and recovery, with useful steps you can take in any season.

Patience

Melasma usually takes three to twelve months to respond, and longer-standing patches take longer (American Academy of Dermatology). Judging a plan after six weeks is judging it too early. There is more on this in how long results last.

Maintaining your progress

When patches fade, your plan can become simpler. Sun protection and suitable home care help support your progress, with review to decide what you still need. Maintenance should feel manageable and fit your life.

How we approach melasma at TCMA

We start by working out what you actually have. Melasma, sun spots and marks after inflammation can look similar and often sit side by side, and they need different plans. A new or changing spot is checked medically before anything cosmetic is discussed.

From there, the plan is staged. We look at your history, what has helped and what has made things worse, and record a starting point with skin imaging. Home care and protection come first. Where appropriate, prescription options are discussed as part of a medical consultation. Any procedure is considered for its place in the longer plan, not as a standalone fix, and progress is reviewed before anything is added.

You can read more about our approach to pigmentation and melasma in Sydney.

Frequently asked questions

Related reading

• Start with your concernPigmentation and melasma in SydneyHow we assess pigmentation, what the options are, and how a staged plan works.
• Comparing devicesPico or IPL for pigmentationWhy identifying the type of pigment matters more than choosing the machine.
• Menopause and skinSkin changes during menopauseHow hormonal change affects skin, and what a long-term plan looks like.

References

• DermNet: Melasma
• American Academy of Dermatology: Melasma treatment
• American Academy of Dermatology: Melasma self-care

Reviewed by Dr Amy Chahal, Cosmetic Physician, 29 September 2026. This article is general information and does not replace individual medical advice.