The principles of bacterial vaginitis treatment are based on the use of anti-anaerobic drugs, mainly metronidazole, tinidazole and clindamycin. Metronidazole inhibits the growth of anaerobic bacteria and does not affect the growth of Lactobacillus, which is the more ideal drug. The dosing method is as follows: i. Oral medication. Preferred metronidazole 400 mg, taken orally twice a day for 7 days. Second, vaginal plugs. Contain metronidazole pessary 200 mg, plug once a night for 7 days, or diazotide pessary, plug every other day, for 4 times. Topical wash with iodophor solution. If recurrent, you can use different anti-anaerobic drugs for the initial treatment, such as metronidazole for the first time, and tinidazole or clindamycin for recurrence, or you can use vaginal lactobacillus preparation to improve the vaginal acid-base environment.