The main reason for the odor after menstruation is that the pads are used for a long time during menstruation, and since the pads are not breathable, it may cause the vulva to have an odor and bacterial infection. In general, wait for the period after cleaning, wash the vulva every night, after 3-4 days after the odor will disappear naturally. In some cases, the odor is more pronounced, accompanied by vulvar itching, or leukorrhea is yellowish-purulent, or the amount of leukorrhea increases, indicating that vaginitis is present. The most common type of vaginitis is bacterial vaginitis, which is caused by prolonged use of sanitary products during menstruation, as well as lack of air in the vulva, or bacterial infections, so it is necessary to go to the hospital as soon as possible for examination and treatment.