Bacterial vaginitis is a mixed infection caused by an imbalance in the ecological balance of the bacteria that parasitize the vagina Bacterial vaginitis is the most common inflammation of the vagina and is not caused by one type of bacteria, but usually by a mixture of bacteria. In the normal environment of the vagina, the flora is Lactobacillus, which produces lactic acid in the vagina, thus maintaining an acidic environment in the vagina. The function of lactic acid is to inhibit the growth of other harmful bacteria in the vagina and maintain the acidic environment in the vagina to avoid infection. If the lactobacillus bacteria decrease in the vagina, the pH value in the vagina will increase, the acidic environment will be destroyed, and the ecological balance of the bacteria that normally live in the vagina will be out of balance, and then microorganisms will multiply in large quantities in the vagina, which will lead to bacterial vaginitis. If there is an increase in vaginal discharge, accompanied by fishy odor, vulvar itching and other symptoms, you need to consult a doctor in a timely manner, by the doctor to formulate a professional treatment plan, do not blindly self-treatment, so as not to delay the condition.