If a woman has brown discharge after exercise, it may be caused by the following factors: 1, caused by ovulatory bleeding when the woman is in ovulation, because the woman is unable to support the endometrium during ovulation due to the sudden drop of estrogen in the body, resulting in a small amount of shedding of the endometrium causing bleeding, and because the amount of bleeding is relatively small, brown discharge will appear. 2, brown discharge after exercise There is brown discharge after exercise, it may also be the arrival of normal menstruation, because it is in the premenstrual period endometrial shedding is relatively small, so there will be a small amount of bleeding resulting in brown discharge. 3, some patients suffer from gynecological diseases caused by the above symptoms, the more common clinical endometritis. The endometrium is stimulated by inflammation, which leads to congestion and irregular vaginal bleeding.