Bleeding after IUD may be due to inflammatory changes in the endometrium, mechanical stimulation, increased menstruation or prolonged periods, or dislodgement of the birth control ring. It is recommended that women should go to the hospital for ultrasound examination in a timely manner to rule out the dislodgement of the birth control ring and take reasonable treatment according to the examination results. Common causes 1, endometrial inflammatory changes: the birth control ring in the uterus is a foreign body, easy to cause inflammatory changes in the endometrium, and then increased prostaglandin secretion, blood vessel rupture, resulting in bleeding; 2, endometrial shedding: the birth control ring in the uterus to stimulate the endometrium, resulting in irregular shedding of the endometrium, causing irregular vaginal bleeding; 3, mechanical stimulation: the birth control ring in the uterus compression, stimulation of the uterine Endometrium, causing abnormal contraction of the uterus and a small amount of blood vessel rupture, and then bleeding after the IUD; 4, increased menstruation or prolonged periods: the IUD stimulates and compresses the endometrium or vascular endothelial cells, resulting in the release of a large amount of prostaglandins, fibrinogen, activating factors, kinins and other substances, which increases the permeability of blood vessels and the activity of the fibrinolytic system, causing excessive menstruation or prolonged periods, and sometimes women It may be mistaken for bleeding after carrying the ring; 5. Dislodgement of the birth control ring: If the birth control ring is abnormally dislodged due to poor fixation or other reasons, it can also lead to vaginal bleeding. Treatment 1, rest: women with IUD bleeding phenomenon, should pay attention to rest, avoid strenuous activities; 2, drugs: a small amount of vaginal bleeding, you can take antibiotics under the guidance of the doctor, such as levofloxacin; 3, remove the ring: if the IUD falls off or 3 months after the placement of the IUD, there is still vaginal bleeding or menstrual irregularities, may be women do not adapt to the IUD, it is recommended to remove the ring. Note that women should rest 1-2 days after the IUD, and do not do heavy physical labor for a week to avoid dislodging the IUD and bleeding. At the same time, women should pay attention to wash the vulva every day after IUD removal to keep it clean, and do not sit in the tub and take a bath or have intercourse for 3 weeks to avoid infection. If the amount of menstruation increases significantly, the period of menstruation is prolonged or there is often a small amount of bleeding, as well as serious back pain and abdominal pain, it is abnormal and should be checked at the hospital.