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Learn More: Skin Care Science

Common Skin Conditions -- Acne

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Acne results when excess oil from overactive sebaceous glands blocks pores, trapping bacteria, dirt, and dead cells inside. Bacteria proliferate within the blocked pore, leading to an infection.

There are many types of acne lesions including blackheads (open comedos), whiteheads (closed comedos), pimples (pustules), and cystic acne.

Hormone fluctuations that occur with adolescence or pregnancy may aggravate the condition. Acne can appear anywhere on the body, but the condition most commonly appears on areas of the skin that have large pores with abundant, active oil glands such as the face, chest, and back.

Common Skin Conditions -- Acne
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Last reviewed on: July, 2009
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