Vaginal discharge after menstruation has a bad smell, the most common clinical reason is that in the menstrual period did not strengthen the vulva care, did not change the sanitary napkin in time, resulting in pathogenic bacteria into the vagina and cause inflammatory reaction, the most common is anaerobic bacteria infection caused by bacterial vaginosis, generally through the metronidazole suppository to the vagina for treatment, the vast majority of symptoms will be significantly relieved in about 3 days, and it is recommended to use a course of treatment for 7 days, this symptom will basically disappear. After a course of treatment for 7 days, the symptoms will basically disappear. If the odor does not disappear after 3 days of treatment, it is recommended to go to the hospital for a checkup because it is not only inflammation that causes vaginal discharge to be smelly, but also cancers, such as cervical cancers, that can cause smelly discharge. Cancer of the cervix, endometrial cancer, etc. can also cause this clinical symptom.