These 6 Ingredients Don't Mix Well With the Sun

Salicylic acid is a beta-hydroxy acid (BHA) that's primarily used to treat acne-prone skin. It works by exfoliating the top layer of skin so that pores become, and stay, unclogged. Because of its exfoliating properties, it can cause the skin to be more sensitive. For that reason, it's best to use salicylic acid in the evenings and to always wear a layer of SPF 30 during the day while using salicylic acid, whether it's via cleanser, spot treatment, or mask. Without SPF — especially if you apply salicylic acid during the day and are exposed to the sun — you can experience burns, hyperpigmentation, and even premature aging.

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