Acne is a skin condition that occurs when the oil glands in your skin are clogged and become inflamed or infected. More than 90% of teenagers have some acne.
With acne you will probably have:
What causes acne pimples?
Acne develops when sebum — an oily substance that lubricates your hair and skin — and dead skin cells plug hair follicles. Bacteria can trigger inflammation and infection resulting in more severe acne.