Resurfacing treatments leave skin unusually vulnerable to UV, and sun exposure too early is the fastest way to undo the result. Here is how long the risk window lasts for peels, lasers and microneedling, when it is safe to start applying SPF again, and what kind of formula to use.

Sunscreen can't erase the freckles you already have, but it can stop new ones forming and keep existing ones from darkening. Here's how freckles actually work, how they differ from sun spots, and what daily SPF changes.

Blue light from your laptop is a tiny fraction of what one minute outdoors delivers — but visible light does affect pigmentation. Here's what the evidence actually supports and what's worth doing about it.

Fall is the best window of the year to undo summer's damage — lower UV means your skin can tolerate the actives that actually fade dark spots. Here's a step-by-step recovery routine.