The main reasons for not being able to control ejaculation are psychological factors, reproductive system diseases and drug effects. 1. Psychological factors: if the patient is anxious, too worried about premature ejaculation and resistance to sexual intercourse partner, these abnormal and strong emotions can easily cause nerve reflex disorders, leading to ejaculation center nerve reaction threshold is lowered, the phenomenon of uncontrollable ejaculation will occur. 2. Reproductive system diseases: If the male reproductive system has such reproductive system diseases as prostatitis, vas deferens stenosis and scrotal tuberculosis, it will result in the dysfunction of the reproductive system, which includes the lowering of ejaculation control ability. 3. Drugs: If you are taking sedative or anti-anxiety drugs such as phenobarbital tablets, oxazepam tablets and scopolamine butylbromide capsules, they may inhibit the normal physiological function of the ejaculatory center, leading to a loss of ejaculatory control. If you can’t control ejaculation, you should go to the hospital in time to find out the reason, so as not to cause adverse consequences.