The most common clinical causes of vaginal discharge that is yellow in color are: First, cervical cancer causes profuse exudation and is occasionally accompanied by bloody discharge. Second, endometrial cancer will have a large amount of plasma discharge, and the vagina will show a yellow watery discharge. Thirdly, fallopian tube cancer will have large amount of vaginal discharge, and the discharge has no odor. This situation should be given high attention clinically, and it is recommended to do gynecological examination and routine examination of leukorrhea to exclude the situation of yellow vaginal discharge caused by vaginal inflammation. Cervical cancer screening and ultrasound are recommended to find out whether there is any abnormality in the endometrium and fallopian tubes, and diagnostic scraping is recommended when necessary.