 Acne is a disorder resulting from the action of hormones and other substances on the skin's oil glands (sebaceous glands) and hair follicles. These factors lead to plugged pores and outbreaks of lesions commonly called pimples or zits. Acne lesions usually occur on the face, neck, back, chest, and shoulders. Although acne is usually not a serious health threat, it can be a source of significant emotional distress. Severe acne can lead to permanent scarring.
Acne types:. - Acne vulgaris - most commonly experienced around puberty, typically of the face and shoulders/chest
- Acne rosacea - a red rash predominantly on the face
- Acne keloidalis nuchae (Pseudofolliculitis nuchae) - a rash caused by shaving
- Acne conglobata (Hidradenitis suppurativa) - chronic abscesses or boils of sweat glands and hair follicles; in the underarms, groin and buttocks, and under the breasts in women
- Acne cosmetica - acne caused by cosmetics
- Acne fulminans - an extreme form of acne conglobata
- Acne medicamentosa - acne caused by starting or stopping a medicine
- Baby acne - a rash seen on the cheeks, chin, and forehead of infants
- Chloracne - an acne rash caused by exposure to chlorinated hydrocarbons such as dioxins or PCBs
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