Acne usually refers to acne, and the causes of acne on girls’ faces may include endocrine disorders, excessive oil secretion, and cosmetic irritation. Some patients are also affected by genetic, immune, emotional and dietary factors. 1. Endocrine disorders: hormone levels can change around the time of menstruation and when there is too much mental stress; at the same time, diseases such as polycystic ovary syndrome can also lead to hormone disorders, which may lead to acne. 2. Exuberant oil secretion: After summer or sports, the skin oil secretion increases, and some girls have oily skin, which is easy to breed bacteria and clog pores. 3. Cosmetic stimulation: girls use too many skin care products and makeup products, for the skin cleaning is not in place, cosmetic residues in the skin to produce stimulation, and there is also the possibility of clogging the pores, will cause acne. There are many causes of acne, try to avoid scratching caused by infection, it is recommended to go to the hospital in a timely manner in the physician’s diagnosis of symptomatic treatment.