Acne on the face, also known as common acne, is caused by the following factors: First, genetic factors, some patients have a family history. Second, androgen secretion. After puberty, androgen secretion is high, resulting in increased sebaceous gland activity, increased oil secretion, sebaceous gland duct keratinization, and the formation of acne in the cheek area. Third, bacterial infection. Propionibacterium acnes proliferates in the cheek area, easily causing inflammatory papules, nodules, and cysts. Fourth, drug-induced. Long-term oral or topical use of corticosteroids, or iodide caused. Fifth, other factors. For example, often stay up late, eat too much chili, external use of unsuitable cosmetics, etc.