Repeated acne on the chin of women is mostly considered to be acne. Acne is caused by a variety of reasons, including endocrine disorders, blockage of the hair follicle, inflammatory reactions, etc., which can cause the sebaceous glands to secrete abundantly and increase the accumulation of oil in the hair follicles: 1. Endocrine disorders: The sebaceous glands of the hair follicles are regulated by sex hormones. The sebaceous glands of the chin are dense, causing recurrent acne; 2. Follicle mouth blockage: Propionibacterium acnes can hydrolyze sebum and form free fatty acids in the hair follicle, causing sebum secretion and discharge to be blocked, and sebum and keratin plugs to accumulate at the follicle mouth to form acne; 3. At the same time, Propionibacterium acnes can promote the production of inflammatory factors in the body, causing an inflammatory response, causing damage to the hair follicle wall to rupture, and various follicle contents to cause inflammation around the follicle, thus expanding the scope of inflammation, resulting in repeated infections and acne; 4, other causes: if you like to eat spicy, sweet and greasy and other stimulating food, can promote the sebaceous glands secrete sebum. Often wear a mask can also be due to repeated friction chin, stimulating sebaceous glands aggravate acne. In addition, poor cleaning or excessive cleaning, can also cause this phenomenon.