The menstruation after removing the IUD is rarely, there may be non-pathological factors, such as active ring; there may be pathological factors, such as endometrial and cervical canal lesions. 1. Non-pathological factors: if the active ring contains copper elements, it will release copper ions, causing aseptic inflammatory stimulation, which will lead to heavy menstruation due to stimulation of the endometrium; when the aseptic inflammatory stimulation is lifted after removal of the ring, menstruation will return to normal, which will be manifested as a decrease in menstruation compared with the previous period. 2. Pathological factors: it may be caused by endometrial damage and cervical tube adhesion in the process of removing the IUD; gynecological inflammation, luteal insufficiency, and abnormal thyroid lactation hormone function can also cause menstrual bleeding. It is recommended that women need to go to a regular hospital to receive a checkup, according to the results of the treatment under the guidance of specialists, and usually need to pay attention to personal hygiene, to avoid causing infections affecting health.