The cleanliness of vaginal discharge is divided into four degrees: degree I, degree II, degree III and degree IV. Degrees I and II are generally not too problematic; degrees III and IV suggest the possibility of vaginal inflammation. Vaginal cleanliness degree I means that a large number of lactobacilli are visible as well as a large number of epithelial cells. Vaginal discharge cleanliness degree II means that some vaginal lactobacilli and epithelial cells are visible. Vaginal secretion cleanliness degree III, a small amount of Lactobacillus and a small amount of epithelial cells can be seen. Vaginal discharge cleanliness degree IV means that there is almost no lactobacilli and no epithelial cells in the vagina. The worse the cleanliness of the vagina, the more likely it is to be inflammatory. It is necessary to further combine the presence or absence of clue cells, trichomonas and mycobacteria to clearly diagnose which type of vaginitis is present and then treat it symptomatically.