Acne occurs most commonly during adolescence, affecting an estimated 80–90% of teenagers in the Western world. Lower rates are reported in some rural societies. Though it becomes less common in adulthood than in adolescence, nearly half of people in their twenties and thirties continue to have acne. About 4% continue to have difficulties into their forties.
Acne is, affecting over 80% of teenagers at some point. Estimates of prevalence vary depending on study populations and the method of assessment used. Prevalence of acne in a community sample of 14-16 year olds has been recorded as 50% and it has been estimated that up to 30% of teenagers have acne of sufficient severity to require medical treatment.