The difference between dream semen and seminal emission lies in the difference in meaning and scope. 1. Different meanings: dream semen refers to the phenomenon of semen flowing out of the body without conscious control during sleep; seminal emission refers to the phenomenon of semen flowing out of the body without conscious control when there is no masturbation or sexual life. 2. The scope is different: dream semen is a form of seminal emission, the scope is relatively single; seminal emission includes dream semen, but also includes slippery semen, the scope is relatively large. Slippery semen is the phenomenon of semen flowing out of the patient’s awake state without conscious control, which is also a form of seminal emission. Occasional dreaming and spermatorrhea usually do not cause harm to the body, but frequent dreaming and spermatorrhea may lead to poor mental health, insomnia, fatigue, weakness and soreness of the waist and knees, and other adverse consequences. Patients with symptoms of frequent dreaming and spermatorrhea should go to a regular hospital in time and be treated under the guidance of a doctor.