The following precautions should be taken before IUD placement: First, the IUD should be placed within 3-7 days after menstruation, as the amount of post-operative bleeding will be very small and less traumatic for the patient; second, the patient should not have intercourse before IUD placement to avoid unwanted pregnancy; third, the patient should check the leucorrhoea and gynecological internal examination before IUD placement to exclude inflammatory diseases of the vagina and pelvis to avoid the spread of inflammation during the IUD placement. Thirdly, the patient needs to check the leucorrhoea and gynecological internal examination before the IUD is placed to exclude inflammatory diseases of the vagina and pelvis to avoid the spread of inflammation during the process of IUD placement. The precautions after IUD are as follows: first, patients should not have intercourse within one month after IUD placement; second, one month after IUD placement, patients should have an ultrasound to observe whether the position of the IUD is appropriate and whether there is any downward movement of the IUD; third, after IUD placement, patients should not eat spicy food and less seafood and other hair products within one month.