There are several reasons for the coffee-colored discharge after menstruation: First, endocrine disorders, due to the lack of estrogen secretion in the body, resulting in the endometrium after menstruation can not be well repaired, or the luteum atrophy is not good, resulting in irregular shedding of the endometrium. Secondly, organic lesions of the uterus, such as endometrial polyps, uterine diverticula, and submucosal fibroids. Thirdly, if the intrauterine device is placed, a small amount of spot bleeding may occur, or caused by the displacement of the intrauterine device, which may also cause an increase in leukorrhea, accompanied by lower abdominal distension and pain. Fourth, gynecological inflammation, if a woman suffers from endometritis, cervicitis and other diseases, it is recommended to do gynecological examination, ultrasonography, and sex hormone six and other related examinations, and hysteroscopy, if necessary, and then treatment.