Patients with bacterial vaginitis who take metronidazole tablets for treatment usually need to use the medication three times a day. Metronidazole is a common gynecological drug that can be used to treat bacterial vaginitis and trichomoniasis. Bacterial vaginitis is a mixed infection caused by dysbiosis of the normal vaginal flora. It is often associated with too frequent sexual intercourse, prolonged vaginal douching, bad lifestyle habits, and sexual intercourse during menstruation, etc. The main manifestation is thin and increased vaginal discharge with a fishy smell. Patients with bacterial vaginitis usually need to take metronidazole tablets three times a day, usually in a course of seven days. When treating bacterial vaginitis, patients must first go to the gynecology department of a regular hospital, complete the relevant tests, and then use the medication under the guidance of the doctor, not blindly self-medication, so as not to cause adverse effects, which is not conducive to the improvement of the disease.