Acne on the face and back is acne, most of which occurs during adolescence. It is associated with high levels of sex hormones, mainly androgens, high oil secretion on the face and back, infection with Propionibacterium acnes, abnormal keratinization and inflammation of the sebaceous ducts of the hair follicles, and to a lesser extent, genetic predisposition, staying up late, and diet. Fats, sugars and cocoa can change the lipids on the skin surface and increase sebum production, which can cause or worsen acne. Stimulating foods such as chili peppers and alcohol can also cause acne on the face and back. When treating acne, we should target as many acne-causing links as possible, and commonly use physical therapy such as retinoic acid, antibiotics, and red and blue light, which can be combined with oral Chinese medicine.