The IUD is usually performed within 3-7 days after menstruation, because the endometrium is more stable at that time, which can avoid heavy bleeding and reduce pain and other discomfort during the IUD. If you have gynecological diseases such as pelvic inflammatory disease, vaginitis, cervicitis and uterine prolapse, you should treat them first before considering IUD insertion. On the day of IUI, pay attention to clean the vulva and avoid vaginal medication. After IUI, you can take oral anti-inflammatory medicine for 3-5 days to prevent infection; avoid sexual intercourse and tub bath for at least half a month; pay attention to rest, no strenuous exercise and heavy physical labor for 1 week; keep your vulva clean and dry; pay attention to balanced nutrition, no cold, spicy and stimulating food. After the IUD, you should go to the hospital for review in the 1st, 3rd and 6th month, and at least once a year afterwards.