There are a lot of black hairs around the breasts, which may belong to the normal physiological phenomenon, or it may be related to the elevation of androgen. 1. Normal physiological phenomenon: due to the presence of hair follicles around the breast, there are hair follicles may grow hair, is a normal physiological phenomenon, generally do not need special treatment. 2. Elevated androgen: If the number of black hairs is high, it may also be caused by elevated androgen levels, and it is best to go to the hospital for a hormone six test to see if there is polycystic ovary syndrome. In this case, the patient’s body hormone levels are out of balance, in addition to around the breasts, the armpits as well as the pubic hair will be relatively thick. If the dark hair affects the patient’s aesthetics, it is recommended that the patient seeks medical attention in a timely manner to deal with the problem through methods such as laser hair removal.