What is acne? Certainly, most of us know what it is, simply because we have had to experience is at one time or another in our lives. But, in case a definition is needed, here is a short one. Acne is a dermatological term that includes clogged pores, pimples and lumps or cysts that occur almost anywhere on the body, but most commonly it occurs on the face, back, chest, neck, and shoulders.

Acne occurs most commonly in teenagers, but it is not limited to any age group, affecting even adults in their forties.

Acne is a disease which has many different varieties, and although none are life threatening, the more severe cases of acne can be disfiguring, leaving permanent scars on effected areas. The typical acne lesions are comedones (also known as blackheads and whiteheads) and inflammatory papules, pustules, and nodules. Some of the large nodules and the term nodulocystic have been used to describe severe cases of inflammatory acne. Aside from scarring, its main effects are psychological, such as reduced self-esteem and, according to at least one study, depression or suicide.

Acne usually appears during adolescense, when people already tend to be most socially insecure. Early and aggressive treatment is therefore used by some to lessen the overall impact to individuals.