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Hormones may explain why acne is so common in teenagers. During puberty, hormones called androgens increase the size of the skin's oil glands. These glands ...

What Causes Acne? Acne is caused by overactive oil glands in the skin and a buildup of oil, dead skin cells, and bacteria, which leads to inflammation.

Bacteria can trigger inflammation and infection resulting in more severe acne. Four main factors cause acne: Excess oil (sebum) production; Hair ...

Acne occurs when tiny holes on the surface of the skin become clogged. These holes are called pores. Each pore opens to a follicle. A follicle contains a hair ...

Acne includes pimples, whiteheads (or pustules), blackheads, and cysts. It occurs within tiny pores associated with hair follicles on the face, ...

What causes acne? ... Acne occurs when the pores of your skin become blocked with oil, dead skin, or bacteria. Each pore of your skin opens to a ...

What causes acne? Clogged hair follicles or pores cause acne. Your hair follicles are small tubes that hold a strand of your hair.

A range of factors triggers acne, but the main cause is thought to be a rise in androgen levels. Androgen is a type of hormone, the levels of which rise ...