When women experience back pain and soreness after the IUD, this may be caused by the ring pressing on the endometrium, resulting in aseptic endometritis, which reflexively stimulates the uterus to contract. In other cases, the endometrium is stimulated to secrete too much mucus, which means that the leucorrhea increases, leading to this condition. Some women have a loose uterine opening, a large uterine cavity, and a heavy menstrual flow, which can lead to displacement or dislodgement of the ring after menstruation, which can also lead to back pain and backache. Some women may also have irregular vaginal bleeding or abnormal discharge. In this case, it is advisable to have a gynecological examination and pelvic ultrasound to find out if there is any change in the position of the ring.