Yellow purulent leucorrhea in the vagina, there may be several reasons: 1. to see if there are problems with the cervix, it is recommended to do gynecological internal examination and cervical cancer screening, if there is serious cervicitis or cervical cancer, yellow purulent leucorrhea will appear. 2. it is recommended to do gynecological ultrasound examination to see if there are abnormalities in the uterus, adnexa and endometrium, if there are lesions in the endometrium, or excessive hyperplasia, or if there are endometrial polyps, or If you have endometrial cancer, you will also have yellow purulent leucorrhea. 3, you may have vaginitis, it is recommended to check the routine of leucorrhea to see if there are trichomonas, mycobacteria, bacteria, miscellaneous bacteria and other infections, if there is a serious vaginitis or mixed infection, you will also have yellow purulent leucorrhea.