Dream sperm is generally said to be dreaming, more than thirty years old still dreaming, may be a normal phenomenon, may also be prostatitis, urethritis and other factors caused by. 1. Normal phenomenon: If there is no normal sex life for a long time, or recent work fatigue, life pressure. It may cause the situation of dreaming, usually occurs occasionally, belongs to the normal phenomenon. 2. Prostatitis: local inflammatory stimulation may lead to swelling and congestion of the prostate, which may affect the ejaculatory activity, thus resulting in the phenomenon of sleepless nights in the thirties. 3. Urethritis: If the urethritis is not timely treatment, the local inflammation of the adverse stimulation, may cause the patient to appear the phenomenon of sleeplessness. Thirty-something often sleep over may also be caused by other factors, exclude physiological factors, should pay attention to, timely to the regular hospital consultation, early treatment, so as not to delay the condition.