For determining what vaginitis is, it is mainly based on the clinical symptoms of the patient and the results of the examination of the leucorrhea secretions. There are three common types of vaginitis: 1. Trichomoniasis, where the patient has heavy symptoms of vulvar itching, leucorrhea is particularly abundant, yellow and foamy, very thin, and has a fishy odor, and the leucorrhea examination suggests that trichomonas can be seen, it can be diagnosed as trichomoniasis. 2. Pseudomonal vaginal yeast disease. The patient’s symptoms of vulvovaginal itching are obvious, and there is a large amount of beanbag-like leucorrhea or curd-like leucorrhea, and a large number of fungal spores can be seen in the routine leucorrhea examination, and the diagnosis is clear. 3. Bacterial vaginosis, the patient has only mild vulvar itching or no itching symptoms, and the leucorrhea is yellow with a fishy odor, and a large number of white blood cells can be seen in the leucorrhea examination, and the leucocyte esterase is positive. With the above explanation, it is possible to distinguish these three types of vaginitis.