Melasma: why sun protection is the whole treatment
Melasma is chronic and relapsing. Understanding light exposure is what separates lasting results from repeated disappointment.

Melasma is triggered by ultraviolet light, visible light and heat, which is why treatment plans that ignore daily protection consistently relapse.
A tinted mineral sunscreen containing iron oxides blocks visible light in a way that clear chemical sunscreens do not. Reapplication matters as much as the initial application.
Prescription topicals and carefully selected procedures can accelerate clearance, but maintenance is lifelong.