The IUD is an intrauterine device, which is a contraceptive device placed in the uterine cavity . It is safe, effective and easy to place and remove, and can achieve the desired contraceptive effect. After the IUD is placed, it may be displaced, and most of the reasons are related to improper selection of the ring number and heavy menstrual flow. 1. Judgment of IUD displacement 1. Judgment according to clinical performance IUD displacement can lead to irregular vaginal bleeding, painful intercourse, abdominal pain, back pain, intrauterine infection, early pregnancy, etc. If the above symptoms occur, timely improvement of auxiliary examination can determine whether the IUD is displaced or not; 2. Judgment according to auxiliary examination Because the IUD contains copper, it can appear under X-ray, so X-ray examination can observe whether the IUD is displaced or not. The IUD can be observed by X-ray examination to see if it has shifted. In addition, ultrasound examination or hysteroscopy can also determine whether there is displacement. 2, before and after the placement of the IUD 1, in order to avoid infection, three days before and two weeks after the operation to strictly abstain from intercourse; 2, usually pay attention to vaginal hygiene, after the IUD to avoid bathing, so as not to cause infection of the uterine cavity; 3, pay attention to rest after the operation, do not do heavy physical labor and heavy sports activities within a week; 4, the first month after the IUD, after the clean menstruation to the hospital for a check-up, three months after the re-check Once.