There are several cases of brown vaginal discharge in women: a. If there is brown vaginal discharge in the middle of menstruation, it may be ovulatory bleeding, which usually does not need to be treated and will end naturally in 2-3 days. If there is brown vaginal discharge before menstruation, it is caused by a small amount of endometrial shedding and bleeding, which is a normal physiological phenomenon and does not require special treatment. Third, the first few months after the IUD, due to the IUD on the endometrial formation of chronic inflammation, prone to a small amount of bleeding, the vagina will appear brown discharge phenomenon. Fourth, after the fertilized egg is laid after pregnancy, some women will experience a small amount of bleeding and brown discharge. Fifth, if brown vaginal discharge appears after one month of pregnancy, it may be a pre-eclampsia miscarriage. Some women may also have brown vaginal discharge due to cervicitis, uterine or cervical malignancy.