The specific cause of BV bacterial vaginosis is not very clear. It may be a mixed infection caused by unclean sex, repeated high concentration of vaginal douche douche, which disorders the acid-base balance in the vagina and disturbs the normal flora, resulting in the proliferation of some Gardnerella and anaerobic bacteria. It can also be transmitted through indirect contact, such as public baths, toilets, sharing basins and towels, etc. The clinical manifestations are mainly increased vaginal discharge, thin, with fishy odor, accompanied by vulvar itching or vaginal burning sensation. Treatment options are mainly anti-anaerobic drugs, oral or topical, such as metronidazole, tinidazole, clindamycin, etc. Pay attention to vaginal cleanliness and hygiene, change underwear regularly, and actively treat the disease once it is detected, and medicate sexual partners at the same time to avoid cross-infection.