Masturbation may cause genitourinary infections, and may cause a decline in sexual function, as well as neurological symptoms. 1. Genitourinary system infection: masturbation is easy to cause congestion and swelling of the genitourinary system, easily induced infection caused by urethritis, cystitis, women may cause vaginitis, cervicitis; men may also cause glansitis, phimosis, prostatitis and other diseases. 2. Decline in sexual function: frequent masturbation may also cause a decline in libido, poor quality of sex life, men may also cause impotence, premature ejaculation and other diseases. 3. Neurological symptoms: frequent masturbation may also cause dizziness and fatigue, tinnitus and fatigue, memory loss and other neurological symptoms. Frequent masturbation can bring a lot of harm, should pay attention to personal life and hygiene, avoid frequent masturbation, physical discomfort should go to the regular hospital in time for medical treatment.