Vaginitis is an inflammatory disease of the vaginal mucosa and submucosal connective tissue and is a common disease in gynecological clinics. In normal healthy women, due to anatomical and biochemical characteristics, the vagina has a natural defense function against pathogens. They are more susceptible to infection than adolescent and childbearing women. In vaginitis, the leukorrhea changes significantly and is often accompanied by itching of the vulva and vaginal opening. The main changes in leukorrhea in vaginitis are: an increase in volume, often with a bad odor, and a change in the shape of the leukorrhea. Some vaginitis leukorrhea has characteristic changes, such as bacterial vaginosis, which is asymptomatic in 10% to 40% of patients. The discharge is grayish white, uniform and thin, and adheres to the vaginal wall for a long time, and is easily swabbed away from the vaginal wall. In trichomoniasis, the leucorrhea is white or grayish-yellow foamy leucorrhea, and in mycotic vaginitis, the leucorrhea is white thick bean curd-like.