The IUD may cause gynecological inflammation, but the chance of occurrence is generally low. If the surgeon does not strictly observe the aseptic requirements, if the patient has vaginitis, or if the patient has sex too soon after the operation, which leads to the upward movement of anaerobic bacteria and other pathogens, then endometritis and other gynecological infections may occur, but the probability of this happening is generally relatively low. Since the IUD is a foreign body, it may stimulate the uterus to contract, causing abdominal pain, lumbago and other discomforts; at the same time, the IUD is an invasive operation, so it may cause damage to the vagina, endometrium and other tissues, which may cause a small amount of vaginal bleeding and other discomforts. For women who want to have an IUD, the operation is usually carried out in 3~7 days after menstruation, and after the IUD, we should pay attention to keep the vulva clean and hygienic, and prohibit sexual intercourse and tub bath for 2 weeks after the operation. If there is any discomfort such as abdominal pain, vaginal bleeding, etc., it is recommended to go to gynecology department of the regular hospital, and then take active treatments under the guidance of the doctor after clearing out the causes of the disease.