An IUD is a contraceptive device placed in the uterine cavity and is usually called a birth control ring since most of the devices used initially are ring-shaped. There are many types of IUDs, and the ones commonly used in China are metal single ring, twist ring, mixed ring, birth control ring, T-shaped ring, etc., but metal single ring is the most common. Women with excessive menstruation or severe dysmenorrhea should be cautious about placing IUDs, because most women will experience increased menstruation and increased dysmenorrhea after IUD placement, so people with excessive menstrual bleeding would be better off not using the method of contraception with IUD placement. If you do, consider placing an IUD containing progestin. Take two days off after IUD placement, avoid heavy physical labor for a week, and forbid bathing and sexual intercourse for two weeks. There may be a small amount of vaginal bleeding or slight back pain and abdominal distension during the first few days after IUD insertion, which will disappear naturally within a few days and does not require treatment. If there is a lot of bleeding and abdominal pain, the cause should be identified and treated. After the IUD is released, you should check again after the next menstrual period for pelvic fluoroscopy or ultrasound. 3 months later, and then once a year.