You need to go to a hospital gynecologist for a routine white belt test, also known as a routine discharge test. Do not do vaginal douching or put any medication in the vagina before the test as this may affect the normal test results. The routine vaginal discharge test is performed in the gynecological clinic for sampling and then sent to the laboratory for examination under a microscope, where reasonable medication is selected for treatment according to the type of pathogenic bacteria infecting the vagina. Leukorrhea is a mixture of endocrine secretions from the vagina, cervix and uterine cavity, exfoliated necrotic cells and a small amount of microorganisms. Inflammation in any of these areas can easily cause abnormal leukorrhea, which is manifested by an increased amount, yellow or yellow-green color and a foul odor. The diagnosis can be made by testing the results of the leukorrhea, combined with other clinical symptoms, and if necessary, further colposcopy or hysteroscopy.