Yellow vaginal discharge, there may be the following reasons: 1, there may be vaginitis, it is recommended to check the routine leukorrhea, to see whether there are trichomonas, mold, bacteria, fungi and other infections, if there is a serious vaginitis or mixed infections, there will be a yellow discharge. 2, to see whether there is a lesion of the cervix, it is recommended to do gynecological internal diagnostic examination and cervical cancer screening, if it is a serious cervicitis or cervical carcinoma, there will be a yellow discharge. If there is severe cervicitis or cervical cancer, there will be yellow discharge. 3, gynecological ultrasound is recommended to see if there is any abnormality in the uterus, adnexa and endometrium. If there is any pathology in the endometrium, such as excessive hyperplasia or endometrial polyp, or other pathology in the endometrium, there will be yellow discharge.