Leukorrhea that is yellow in color is most likely caused by the following reasons First, inflammation of the vaginal mucosa, which can lead to increased local exudation and yellowish discharge. Secondly, chronic inflammation of the cervix leads to increased leucorrhea and yellow discharge. The third, chronic inflammation of the pelvis, also leads to yellow vaginal discharge. The fourth, inflammation of the endometrium leads to increased exudation, which also results in a yellow discharge. Therefore, if the leukorrhea appears yellow, it is recommended to give medication only after clinical examination, and not to give medication blindly because it is often not effective before the cause is clarified. Therefore, it is recommended to do routine laboratory tests of the white belt, cervical examination and gynecological double examination to find out whether there is pelvic inflammatory disease.