Acne occurs when hair follicles are clogged with oil and dead skin cells. It is normal during puberty because of hormonal changes. To help clear up acne, attempt washing your face with a mild cleanser twice a day, and do not pinch or pick the pimples. Moreover, benzoyl peroxide or salicylic acid over-the-counter treatments can also be useful. In case these do not work, it is necessary to see a dermatologist.