Masturbation stops halfway may be caused by excessive masturbation, prostatitis, drug effects and other reasons. 1. Excessive masturbation: The frequency of masturbation is too high, which may lead to symptoms such as early loss of libido, erectile dysfunction, and so on, and thus the situation of stopping masturbation in half. 2. Prostatitis: It is a common disease in the urinary system, and some patients may experience symptoms of sexual dysfunction such as loss of libido and erectile dysfunction. When the patient has unclean sex or masturbation frequency is too high, it may lead to the occurrence of prostatitis, triggering the abnormal sexual function, and thus appear to masturbate to half stop the situation. 3. drug effects: such as long-term use of valium, thiazide diuretics, etc., can induce the emergence of abnormal function, so that masturbation to half stop the situation. Masturbation to half stop there are other reasons, such as the influence of mental factors, etc., it is recommended that patients go to the hospital in a timely manner, so as not to delay the condition.