Symptoms: Whiteheads, blackheads, cysts or pimples—plugged pores—on your face, neck, chest, back, shoulders or upper arms.
How to treat it: Keep your hands off your face and wash gently—squeezing and vigorous scrubbing can exacerbate acne. Consult a dermatologist. "Teen acne responds to drying gels, but adult skin needs a gentler remedy," says Polisky, who advises older patients to use Rezamid, a topical cream and cover-up that's less drying than benzoyl peroxide. Certain oral contraceptives have been proven to help control acne, and a new drug, Nicomide, is promising.
Product recommendations: Aveeno Clear Complexion Foaming Cleanser, $7, and L'Oréal Pure Zone Skin Relief Oil-Free moisturizer, $8, contain salicylic acid, a gentle beta-hydroxy acid that helps prevent breakouts.