Can sunscreen remove hyperpigmentation?
Sunscreen does not remove existing hyperpigmentation, but it is the most important step in preventing it from getting darker and in allowing treatments to actually work. UV exposure directly stimulates melanin production, so without sunscreen, any patches you have will deepen with daily sun exposure, regardless of what else you apply.
Hyperpigmentation, whether from acne marks, melasma, or sun damage, is driven by melanin overproduction triggered by UV. Every day without sunscreen is a day that existing patches can get darker. This is why treatments like niacinamide, vitamin C, or kojic acid often feel ineffective on their own. When paired with consistent SPF 50 PA++++ sunscreen, the same ingredients can deliver visible results over 8 to 12 weeks. Think of sunscreen as the foundation layer without which no lightening treatment can do its job properly.