Yellowing of the leucorrhea after menstruation may be caused by gynecological inflammation, including inflammation of the vagina. As far as possible, it is necessary to carry out an examination of the discharge to determine which kind of inflammatory infection it belongs to, and to determine whether there is a change in pH and whether there is an increase in white blood cells. With active treatment, it is possible to avoid cervical congestion and inflammation, as well as the possibility of upstream infection. In the future, as far as possible during the menstrual period, you should also change the sanitary napkin every 4 hours, and the vulva should be washed every day and the underwear should be changed every day, so as to avoid the chance of cross-infection, and to avoid the symptoms of yellowing of the leucorrhoea after the menstrual period.