I. Systemic treatment Option 1: Metronidazole 500mg orally twice a day for 7 days Option 2: Metronidazole 200mg orally three times a day for 7 days Option 3: Metronidazole 2g in a dose II. Vaginal medication For heavy gastrointestinal reactions, those who cannot tolerate oral administration can be vaginally administered Metronidazole 500mg vaginally once a night for 7 days. Lv Hongtao, Department of Obstetrics and Gynecology, Shandong Qianfo Mountain Hospital