The IUD can be removed if a woman’s menstrual cycle is not always clean. An irregular period can be caused by an abnormal lesion in the woman’s reproductive system. For example, the most common diseases, such as endometrial polyps and endometrial cancer, cause always unclean periods. In other cases, the ring may have been in place for a long period of time, and the ring may have failed or become displaced, resulting in an incomplete menstrual cycle. Removal of the ring can eliminate the cause of the problem, and diagnostic curettage can be performed to stop the bleeding. Pathological histological examination can also rule out malignant lesions in women, understand whether there is any lesion in the endometrium, which causes the cause of irregular vaginal bleeding, and can also reflect the normal function of the ovaries from the side through pathological histological examination.