After the IUD, the IUD is a foreign body to the endometrium, so there is an adaptation process. The endometrium of the IUD will reject the IUD, so the following symptoms will occur: a. If the uterus is in retroflexion and retroversion, it will lead to lumbosacral pain. After the IUD, the uterus will contract due to the rejection of the IUD, which will lead to slight swelling and pain in the lower abdomen, which will generally disappear in a week or so. Most of the bleeding is far less than the amount of menstruation and will be clean in a week or so, but some people have been uncomfortable with the IUD, so the vaginal bleeding will last longer. Although the clinical treatment of symptomatic treatment, to stop bleeding, but still can not improve the situation, it is recommended to remove the birth control ring, and use other methods of contraception.