There are several possibilities for brown discharge after menstruation: 1, normal state: the patient has some changes in the position of the uterus, such as a small amount of blood in the uterine cavity, flowing out a little longer, and leucorrhea mixed together, may look brown discharge, in this case is called the physiological state; 2, abnormal state: such as endometrial polyps, cervical erosion, vaginitis, these heavier cases, but also 3, women’s own endocrine function is abnormal, there is brown discharge after menstruation, such as luteal atrophy or luteal insufficiency of these cases; 4, female patients on the IUD: intrauterine device in the inside, some patients will appear after the clean menstruation and brown discharge out. Patients who have this state, it is recommended to visit the hospital to clarify which state they actually belong to, and then do the corresponding treatment according to the specific situation.