Most of the patients in the clinic because of the swelling of the head of the penis, its causes include the following: 1, benign tumors: such as condyloma acuminatum, mostly caused by HPV infection, is a sexually transmitted disease, need to go to the Department of Dermatology and Venereal Diseases for treatment, can be done locally to excise the tumor, the efficacy of the treatment, but prone to recurrence; 2, malignant tumors: such as cancer of the penis, the clinic is relatively rare, and the sanitary conditions are directly related to the patient’s circumcision, the prepuce, long foreskin can lead to chronic infections, long-term stimulation of the easy to trigger malignant tumors of the penis.