Zusammenfassung

• Acne may affect any age group, but it is most common in adolescents.
• Lesions consist of non-inflammatory comedones (whiteheads and blackheads) and inflammatory papules, pustules, nodules, and cysts.
• Severity ranges from mild comedonal acne to severe nodulocystic acne, which can be permanently disfiguring.
• Systemic effects may also be present with acne fulminans, a rare variant.
• Treatments include topical retinoids, keratolytics, and antibiotics; more severe inflammatory lesions may require oral antibiotics; severe nodulocystic acne may require oral isotretinoin.