Different bacterial infections cause different leukorrhea, for example, Candida infection causes leukorrhea that resembles bean curd and is accompanied by significant vulvar itching. In the case of trichomoniasis, the leucorrhea is foamy and may be accompanied by a bloody discharge, as trichomoniasis can cause bleeding spots in the stool due to vaginal adhesion. In the case of bacterial vaginosis, the leucorrhea is relatively thin, abundant and has a strong fishy odor. The leucorrhoea caused by different bacterial infections has different characteristics and can be judged according to the characteristics of the leucorrhoea. The main diagnosis is based on laboratory tests, such as routine leucorrhoea tests, to determine which pathogen is responsible for the infection before treatment is given.