After circumcision penis hair purple is mostly considered to be due to surgery, bandage, etc. caused by poor blood circulation in the glans, but also does not exclude the existence of infection may be, it is recommended that further examination. 1. blood flow obstruction: for the circumcision of the penis hair purple general situation is thought to be due to surgery and other operations may lead to part of the subcutaneous bleeding, as well as in order to prevent postoperative bleeding pressure bandage will lead to local venous, lymphatic reflux is not smooth, may cause the phenomenon of purple glans hair, generally do not need special treatment. 2. Infection: In addition, it is not excluded due to the postoperative medicine change is not timely and other poor care led to the emergence of local wound infection, bleeding and so on, may also cause the turtle hair purple. Circumcision turtle hair purple may also be caused by other factors, so it is recommended to go to the hospital to seek further examination of the doctor, clear specific causes for timely treatment.