The IUD is usually chosen no more than 7 days after the menstrual period has been cleared, and sexual intercourse should be avoided for 3 days before the IUD is inserted. Secondly, you should go to the hospital for routine examination of leukorrhea, as well as cervical liquid-based cytology, and human papillomavirus test, these tests can rule out vaginitis, such as mycosis vaginalis, trichomonas vaginalis, etc., which are not suitable for IUD, and should be treated before IUD. Cervical liquid-based cytology and human papillomavirus tests are done to rule out cervical lesions, and if there are any, they should also be treated before the IUD is put in. Ultrasound should also be done to check the size of the uterus. If the lining of the uterus is more than 0.5cm, the reason should be found out if it is like this in the late menstruation period, and it is not recommended to put on the IUD. If all the tests are normal, you can have an IUD.