You can’t have coitus if you keep having brown discharge after IUD. In general, after 7 days after the IUD vaginal bleeding stops, if there has been a brown discharge may be vaginal bleeding, do not rule out some gynecological inflammation, such as endometritis caused by endometritis after the IUD has been a brown discharge. In addition, the displacement of the ring can not be ruled out caused by vaginal bleeding. Therefore, if you have brown discharge after the IUD, it is recommended to go to the hospital for gynecological examination to understand the vaginal and cervical conditions of some abnormalities, which should be promptly treated symptomatically. To carry out ultrasound examination to understand the situation of the uterine lining, as well as the position of the ring there is no ring downward or off the ring, if the ring is off the ring after the IUD, coitus is also easy to cause pregnancy. So after the IUD brown discharge should promptly find the cause, symptomatic treatment, effective treatment to stop bleeding before intercourse.