IUD refers to the installation of birth control ring, there is no clinical statement that IUD can be used for a maximum of several years, generally can be used for 5-7 years, patients need to pay attention to its related precautions and post-operative care. 1. Precautions: Usually, patients should inform the doctor about their medical history in time before the operation, prohibit sexual intercourse 3 days before the operation, and keep the vagina clean. If the patient has gynecological inflammation, it is necessary to cure the disease before the operation. In case of menopausal transition, the sterilization device should be removed within 1 year after menopause. However, the procedure is contraindicated in patients with pregnancy, acute inflammation of the reproductive tract, uterine malformations, genital tumors, etc. It is also contraindicated in patients with loose cervix, severe old cervical lacerations, uterine prolapse, and patients with severe systemic diseases. If the patients have copper allergy, they should avoid using copper-containing IUD. 2. Post-operative care: patients need to rest for about 3 days after the operation, and avoid physical labor for 1 week, no sex and no pelvic baths for 2 weeks, and keep the vulva clean. Within 3 months after the operation, patients should pay attention to whether the IUD is dislodged during menstruation and after defecation, and should not use vaginal cotton plugs during menstruation. At the same time, patients also need to see the doctor for review 3-5 days after the first menstrual period, and review at 3 months, 6 months and 1 year after the operation. In addition, patients may experience a small amount of vaginal bleeding, lower abdominal discomfort and other symptoms after the operation, which is normal. However, if there is heavy bleeding, abnormal leukorrhea, fever, etc., it is necessary to actively seek medical treatment. Patients are advised to place the IUD under the strict guidance of the doctor and understand the related matters.