If the leukorrhea is very thin, watery and yellowish in color. In this case, the following causes should be ruled out: 1. cancer of the fallopian tubes, which is clinically manifested by a large amount of vaginal fluid discharge, i.e. vaginal discharge that is watery, yellowish in color and odorless, accompanied by pain in the lower abdomen. 2. local epithelial lesions of the cervix should be ruled out, for example, cervical cancer screening is recommended, and whether there is local inflammation of the cervix with congestion and edema. 3. To rule out vaginal inflammation, routine laboratory tests of the white belt can be done, and treatment can be given according to the pathogenic bacteria infected.