Chin acne may be related to endocrine disorders, dietary habits, lack of cleaning, excessive secretion of sebaceous glands, abnormal keratinization of hair follicle openings and other reasons. 1. Endocrine disorders: if you often live a stressful life, poor sleep quality, emotional fluctuations, or hormone level disorders before and after a woman’s menstrual period, the phenomenon of acne will occur. 2. Dietary habits: like to eat barbecue, fat meat, spicy hot pot and other spicy and stimulating and greasy food, easy to cause excessive secretion of oil to clog pores and acne. 3. Cleaning is not in place: cleaning the skin is not thorough, sebum and dust residue in the pores, breeding bacteria to produce inflammation and long acne. 4. Excessive sebaceous gland secretion, abnormal follicle opening keratinization: in the case of excessive sebaceous gland secretion, coupled with abnormal follicle opening keratinization, it will block the pores and increase the chance of infection. There are many reasons for chin and neck acne, so it is recommended to go to a dermatologist to get a clear picture of the cause of the problem and then treat the symptoms.