1. Physiological phenomenon: If a woman has a vaginal discharge like snot after sex, it may be the semen in the body, as well as the fluid secreted by the vestibular gland in the process of sex; men may belong to the secretion of the prostate gland fluid and a small amount of semen, there is no other discomfort, pay attention to hygiene and prevention of infections can be. 2. Disease: If the secretion persists, you should also consider whether there are female vaginitis, cervicitis, endometritis and other diseases, men should consider whether there is urethritis, prostatitis, prostate hyperplasia and other diseases. If it is a physiological phenomenon does not need to be treated, if there is a disease, you should go to the regular hospital in a timely manner to check, follow the doctor’s instructions standardized treatment.