If there is a discharge the day after intercourse, it is important to distinguish whether it is the semen that remains in the vagina after intercourse or the increase in discharge caused by inflammation of the vagina itself. If it is semen that is discharged, most of it will have a fishy odor, and clinically it will not cause vulvar itching, nor will it lead to burning sensation at the vaginal opening. If the vaginal inflammation caused by increased secretion, the color of the secretion is often yellow, and there will be local discomfort in the vaginal opening, such as local hot flashes, and there will be occasional vulvar itching, it is recommended that the best to go to the hospital to do routine laboratory tests, according to the infected pathogens to give medication, pay attention to the hygiene of the sex life, before coitus both men and women have to wash the external genitalia, to reduce the chance of pathogenic bacteria infection, and to reduce the risk of infection. Reduce the chance of pathogenic bacteria infection.