Ejaculation is a neurophysiological reflex, regulated by the sympathetic and parasympathetic nerves, the former plays a dominant role in the process of ejaculation is indeed not subject to conscious control. However, what is usually referred to as “not being able to control ejaculation” generally refers to premature ejaculation, i.e. premature ejaculation, and the common causes are as follows: 1. Psychological factors: men due to high pressure of life, external environmental stimuli, lack of effective communication with their partners, so that the psychological burden is heavy, too many negative emotions, excessive mental tension, anxiety, affecting ejaculation, which in turn affects the sex life, and occasionally premature ejaculation occurs. 2. Primary premature ejaculation: from the first time of sexual intercourse, ejaculation often occurs before or within one minute after insertion of the penis into the vagina. It is mainly caused by decreased central nervous control, genetic abnormalities, and some patients are caused by mental psychological state, inability to correctly understand sexual life, inharmonious relationship with the partner, fear, anxiety, nervousness about sexual life, and even some people are worried about developing into impotence. 3. Secondary premature ejaculation: refers to the normal sexual life before, and then produce premature ejaculation problems. Common causes include phimosis, glans, prostatitis, urethritis, hyperthyroidism and so on. Part of the patient’s long-term over-indulgence, frequent masturbation, making the ejaculatory center increased excitability and premature ejaculation. It is recommended that patients maintain good living habits, exercise and physical fitness, relax the mind, try to avoid negative emotions, communicate with their partners and understand each other. If the situation is serious, you should consult a doctor and choose the appropriate treatment according to the cause of the disease.