The normal white belt is milky white, no odor or only a faint fishy smell, after intercourse secretions will be mixed with semen discharge. If the secretion appears yellow, clinically it may be due to the following reasons: First, the semen itself has problems, such as inflammation of the prostate gland clinically will cause the semen to appear yellow in color, along with the vaginal secretion is discharged, it is recommended that men do the corresponding examination. Second, inflammation of the female vagina or local inflammation of the cervix, after intercourse plus semen will increase the vaginal secretions, so the original secretions and semen together with the discharge of the vagina, only to find the phenomenon of yellow vaginal secretions. It is recommended to do routine laboratory tests on the white belt and gynecological examination at the same time to find out whether there is local inflammation of the cervix, and then give anti-inflammatory treatment.