Bacterial vaginosis occurs as a result of an imbalance in the microecological balance within the vagina. The basic cause of bacterial vaginosis is an imbalance in the bacterial flora that normally hosts the vagina, which may be associated with multiple sexual partners, frequent sexual intercourse or vaginal douching. Normally most of the bacteria in the vagina are Lactobacillus, which inhibits the overgrowth of other harmful microorganisms and maintains a normal flora balance. When Lactobacillus decreases, the pH in the vagina increases, and the vaginal microenvironment becomes imbalanced, other bacterial microorganisms proliferate, commonly Gardnerella, and other anaerobic bacteria as well as Mycoplasma genitalium humanum infections, leading to bacterial vaginosis. In addition, having multiple or new sexual partners, prolonged vaginal douching with water or detergents, gynecological surgeries, multiple pregnancies, and the use of intrauterine devices (IUDs) are risk factors for bacterial vaginosis. If you have any discomfort symptoms, you need to go to the hospital as soon as possible, and the doctor will formulate an individualized diagnosis and treatment plan according to your specific condition, so as not to delay your condition.