Acne surfaces during times of hormonal imbalance. When glands produce more oil than normal, skin pores get clogged, allowing bacteria (and pimples) to grow.
Pimples come in many different forms and depths, including blackheads whiteheads, cysts, and nodules. To banish these troublemakers, research has long pointed to topical medications such as benzoyl peroxide, antibiotics like tetracycline, and oral drugs that contain vitamin A, such as isotretinoin (Accutane) which is for moderate to severe acne. Alternatively, some seek more natural treatments such oral vitamin and mineral supplements.
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Source: Vitamin for acne