Ejaculation during sleep is called dream emission. Ejaculation can be categorized into physiological ejaculation and pathological ejaculation, and pathological ejaculation should go to the hospital in time to find out the specific cause of the disease and give appropriate treatment. After men enter puberty, semen is also produced every day, if it exceeds the storage limit of testes, epididymis and seminal vesicle glands, the phenomenon of seminal emission will occur. Adult males who do not have sex, semen leakage 1~2 times per month without discomfort is normal physiological semen leakage. If there are more than two times a week or have regular normal ejaculation still have frequent semen leakage is called pathologic semen leakage, most of the prostatitis, seminal vesiculitis or prepuce glans inflammation and so on have a certain relationship, need to be actively treated.