The reason for the acne behind the male students are the following: first, the reason for the hormone level, generally in the adolescent hormone secretion level is more vigorous, will be easy to grow acne. Second, the sebaceous glands secrete a lot, that is, more oil, in the front chest, back and face is the distribution of large sweat glands, the oil will also be more than other places, will also be more prone to acne. Third, it is related to acne bacillus infection. Fourth, it is related to bad habits, such as staying up late, smoking, drinking alcohol, etc. If you want to change the situation of acne on your back, you should change your bad habits and reduce the frequency of staying up late and eating spicy and stimulating food. In addition, boys with acne on the back can also apply topical fusidic acid and erythromycin cream for anti-inflammatory treatment.