Men who do not ejaculate for a long time may be caused by the lack of excitement of the sexual nerves, or it may be caused by diseases such as dyspareunia and retrograde ejaculation. 1. Sexual nerve is not excited enough:If the sexual nerve is not excited enough when the patient is having sex, maybe due to psychological problems or factors such as the partner, the patient will not ejaculate for a long time. 2. Inejaculation:Inejaculation is mainly due to emotional problems, lack of sexual knowledge, fatigue, alcohol, too frequent sex life and other factors. The patient’s main symptom is that he can complete sexual intercourse, but he can’t get orgasm and can’t complete ejaculation in the female vagina. 3. Retrograde ejaculation: the cause of retrograde ejaculation is more complex, mostly due to congenital anatomical abnormalities of the bladder neck and local neuropathy and other factors. The patient will have ejaculation action but no sperm flow from the urethra. When a male patient has the symptom of prolonged non-ejaculation, he should consult a doctor in time and follow the doctor’s instructions.