Acne generally refers to acne. The pathogenesis of acne has not been fully elucidated and is related to genetic factors, androgens, sebum secretion, and bacterial colonization. Acne is a chronic inflammatory skin disease of the sebaceous gland unit of the hair follicle, most commonly found in adolescents, preferably on the cheeks and forehead, as well as the chest and back and shoulders. Acne is a multifactorial disease related to genetics, increased sebum secretion induced by elevated androgen levels, keratinization of follicular sebaceous gland ducts, propagation of Propionibacterium acnes, and immune-inflammatory responses. In addition, the onset of some patients can be triggered by psychological factors and diet. People with recurrent acne should improve their lifestyle, such as limiting sugar and milk intake, keeping a regular routine, avoiding late nights, not over-cleaning the skin, and paying attention to moisturizing and oil control. They should go to the hospital in time and use medication under the guidance of a dermatologist.