Definition
Acne vulgaris is a highly prevalent, chronic inflammatory skin condition that occurs when hair follicles become plugged with oil (sebum) and dead skin cells. Characterized by comedones, papules, pustules, and in severe instances, nodules or cysts, acne primarily impacts skin areas with high sebaceous gland density, including the face, chest, and upper back. While extremely common during adolescence, acne can affect individuals of all age groups and carries a significant psychological and cosmetic burden.