Acne is a chronic inflammatory reaction of the sebaceous glands of the hair follicles, which may be related to the following factors: 1. It is related to the high level of androgens. 3. It may be related to abnormal keratinization of the follicular duct wall. If the follicular duct wall is abnormally keratinized and blocked, the cortex cannot be discharged normally, resulting in blockage and blockage, and this blocked cortex will stimulate the follicular wall and cause inflammation, resulting in acne. These are the main causes of acne. Of course, diet is also related to acne, if the diet is too greasy or too sweet, acne will also form. In addition, it is also related to life patterns, such as excessive fatigue, exertion, and sleeping late can also cause acne, so there are different causes for different situations.