Simple methods to prevent mild acne: The best way to treat and prevent mild acne is to wash your skin with a gentle cleanser in the morning, evening, and after heavy exercise. Astringents, scrubs, and masks are often harsh on the skin, producing irritation that will lead to more acne. There are many over-the-counter and prescription treatments, including lotions, antibiotics, and oral contraceptives. Look for lotions with benzoyl peroxide, resorcinol, or salicylic acid to dry excess oil and promote peeling. Do not pick or squeeze blemishes because you may push the infection deeper into the skin and cause scars. Avoid oily and greasy cosmetics, sunscreens, and hair products; only use products labeled “water-based” or “noncomedogenic.” More serious forms of acne may require treatment by a dermatologist. Source: princeton.edu