The BV test is a routine white belt test for bacterial vaginosis caused by anaerobic bacteria. If there is a BV infection, the vaginal discharge will be increased, yellowish in color and thin, and the discharge will have a big fishy smell. It is recommended to actively treat with medication, the first choice is metronidazole or tinidazole, most of them will be cured after one week of continuous use. It is recommended to keep the vulva clean in daily life, especially during sexual and menstrual periods. It is recommended to keep the vulva clean in daily life, especially during sex and menstruation. Changing sanitary napkins during menstruation can reduce the chance of reproductive tract infection.