The only normal vaginal bleeding in women is menstruation, and the menstrual period should be cleared within 2-8 days, more than this time is also abnormal. If brown vaginal discharge occurs after menstruation, it is also considered as vaginal bleeding. We should take into account the duration of the bleeding and the clinical symptoms that accompany the bleeding to determine the cause of the bleeding. For example, if the brown discharge occurs after intercourse, contact bleeding should be considered as a result of cervical lesions, such as cervical inflammation and intraepithelial neoplasia of the cervix, with emphasis on cervical cancer screening. If the bleeding occurs about a week after menstruation without clinical discomfort, consider ovulatory bleeding related to fluctuations in hormone levels during ovulation. If the bleeding is accompanied by abnormal vaginal discharge, pain and discomfort in the abdomen, it is more likely to be inflammatory, such as cervicitis, vaginitis or pelvic inflammatory disease, which requires gynecological examination for a clear diagnosis.