Yellowish leukorrhea after menstruation may be caused by vaginitis, but it may also be caused by a decline in vaginal defenses, as follows: 1, vaginitis: normal women’s leukorrhea should be white, if the color is yellowish, it may be inside the vagina there are trichomoniasis, bacteria, etc., in the growth and reproduction. But at this time, in addition to the yellowing of the leukorrhea, may also be accompanied by vulvar itching, some women will also have a fishy smell. 2, the decline in vaginal defenses: if only simple leukorrhea yellowing, it is possible that women at this time the decline in vaginal defenses. Because after a woman’s menstruation, the body’s estrogen level will be relatively low, the vaginal lactobacillus will be reduced, which can lead to a decline in vaginal defenses, which can easily lead to the yellowing of the leukorrhea.