Spermatorrhea at night may be a normal physiological phenomenon, or it may be caused by psychosomatic factors, somatic diseases and other factors. 1. Normal physiological phenomenon: adult men do not have a normal sex life, and there is no masturbation, the semen in the seminal vesicles gradually increased, in the night time when you sleep will appear semen, only occasionally, the number of times will not be too frequent, belong to the normal physiological phenomenon, do not need to carry out special treatment. 2. Psychological factors: often watch some bad books and videos, in the sleep, there may be some sexual fantasies in the mind, too much energy to focus on sexual problems, in the night sleep will occur spermatorrhea. 3. Physical diseases: for example, the foreskin glans, due to the presence of inflammatory substances in the glans, will lead to penile area congestion and edema, so that the penis is stimulated, it will be easy to have semen leakage at night, accompanied by glans itching, pain and other symptoms. Ejaculation at night can also be caused by other factors. If semen leakage occurs frequently at night, it is recommended to go to regular hospitals for examination and treatment in time to avoid affecting the health of the reproductive system.