Liora · Journal · Pigment & Tone
Melasma: why it keeps coming back
The most frustrating pigment condition in dermatology, because it responds well to treatment and then returns the first warm week of the year. What actually holds it.
Melasma is the condition patients arrive already angry at. Usually they have treated it successfully at least once, watched it fade, stopped doing anything, and found it back within a season. That cycle is not a treatment failure. It is what melasma does, and understanding why changes what you do about it.
What it is
Symmetrical brown or grey-brown patches, most often across the cheekbones, the forehead, the upper lip and the bridge of the nose. The symmetry is the giveaway — this is not a collection of sun spots that happen to be nearby, it is one process affecting matched areas on both sides of the face.
It is more common in women, more common in deeper skin tones, and strongly associated with hormonal change: pregnancy, the combined pill, hormonal IUDs, hormone replacement. The pregnancy association is well enough known to have given it an older name, the mask of pregnancy.
The part most people have never been told
Ultraviolet light drives melasma. So does visible light — the ordinary light you can see — and so does heat.
This is the single most useful fact about the condition, because almost everyone managing melasma is managing it with a sunscreen chosen to handle UV, and a clear sunscreen does very little about visible light. It is also why melasma can flare in someone who is genuinely careful: a day of cloud and no burning still delivers plenty of visible light, and a hot kitchen or a steam room delivers heat with no light at all.
A tinted sunscreen is not a cosmetic preference here. The iron oxides that make it tinted are what give it any meaningful protection in the visible range, which is why tinted formulations are the ones that tend to be recommended for pigment conditions specifically.
What treatment actually looks like
Three things at once, and the order matters less than the fact that it is all three.
Photoprotection, taken seriously, year round, as treatment rather than as prevention. Broad spectrum, SPF 30 or higher, tinted, reapplied. A hat does more than another layer of sunscreen in the middle of a bright day.
Something that slows pigment production. There is a range of topical agents that interrupt the enzyme the process depends on, and the right one depends on your skin, what you have already tried, and what you can tolerate without irritation — which matters more than it sounds, because inflammation itself drives pigment.
Patience with the timeline. Pigment that took months to arrive takes months to leave. Judging a melasma treatment at four weeks is how people conclude nothing works and move on to something more aggressive.
Where it goes wrong
Aggressive resurfacing. Melasma sits in skin that is primed to make pigment in response to injury, and a laser or a peel that is too strong for it can leave you worse than you started — sometimes considerably worse, and sometimes not reversibly.
This is the condition where the pressure to do something dramatic is highest and the case for restraint is strongest. There are device treatments with a place in melasma, used carefully and usually late rather than first, and there is a very real difference between a device chosen for melasma in your skin tone and a device that is simply available.
The honest expectation
Melasma is managed rather than cured. The version of success worth aiming at is faint, stable and not the first thing you see in the mirror, maintained with something you are actually willing to keep doing — not a clear face in eight weeks followed by a return next June.
Patients who hold their result are, almost without exception, the ones who never fully stopped.