What is the cause of acne on the back of the chest?

Chest and back acne, the cause is mainly related to the following points: first, endocrine factors, such as androgens, especially testosterone levels rapidly increased, promote sebaceous gland development and produce a lot of sebum. Second, abnormal keratosis of the hair follicle sebaceous gland duct, leading to duct blockage, sebum can not be discharged normally, and then form micro-acne. Third, Acne propionate reproduction, decomposition of sebum, production of free fatty acids, while chemotactic inflammatory cells and mediators, resulting in immune damage. Fourth, dietary factors, such as sugar, fat, spicy stimulating food, white wine, fried food, etc. can make the disease worse.