Acne is a skin condition where pimples, blackheads, or whiteheads appear, often on the face, chest, or back. It is especially common during teenage years.
From Greek 'akmē', meaning 'point' or 'peak', originally referring to the peak of life or adulthood. A copying error in medieval texts turned 'akmē' into 'acne', and the new form stuck.
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