Acne is a common skin condition that occurs when hair follicles become clogged with oil, dead skin cells, and sometimes bacteria. This leads to the formation of pimples, blackheads, whiteheads, cysts, or nodules, which can appear on the face, chest, back, and shoulders.

Acne is often associated with hormonal changes, such as during puberty, but it can also be influenced by factors like stress, diet, medications, and genetics.