Acne is generally referred to as acne, and the tendency to get acne on the face may be caused by abnormal keratinization of sebaceous gland ducts, abnormal levels of androgens, inflammatory reactions, excessive sebum secretion, as well as heredity and other causes. 1. Abnormal sebaceous gland duct keratinization: Abnormal keratinization of sebaceous gland peripheral cells on the face will make the follicle opening smaller, blocked and narrowed. At this time, sebum can not be discharged, and patients are prone to acne on the face. 2. Abnormal androgen levels: If the level of androgen in the body is too high, the sebaceous glands will be exuberant, at which time the secretion of sebum will increase, which is also prone to inducing acne. 3. Inflammatory response: Increased reproduction of Propionibacterium acnes on the face will stimulate the local hair follicles to become inflamed, and the patient’s face will have pimples, pustules, edema and other manifestations of the skin. 4. Excessive sebum secretion: excessive sebum secretion, sebum will be mixed with the body of the shed epidermis to form a sediment-like material to block the pores, thus inducing facial acne. 5. Others: Acne can also be caused by heredity, excessive mental and psychological stress, and abnormal immune function. It is recommended that acne sufferers should seek medical attention in time, and the doctor will choose the appropriate treatment for the cause.