In most cases, the vaginal bleeding will be clean in a week after the removal of the IUD, but if it takes more than a week, the following reasons are common in clinical practice: firstly, there is an infection because the cervical mucosa and the endometrium will be damaged during the removal of the IUD, and if the body resistance is relatively low, coupled with the lack of a good rest after the operation, and not to strengthen the local care of the vulva, it will lead to the invasion of pathogenic bacteria, which can lead to cervical or endometrial inflammation, and there is bleeding and pain in the lower abdomen. If the body resistance is relatively low, coupled with the lack of rest after the operation and not strengthen the local care of the vulva, it will lead to the invasion of pathogenic bacteria, which will cause inflammation of the cervix or the endometrium, and vaginal bleeding and lower abdominal pain, it is recommended to go to the hospital for examination in a timely manner, and if there is inflammation, timely treatment. Secondly, because the IUD is embedded in the myometrium, the endometrium and the myometrium are damaged to different degrees after the removal of the IUD, so the clinical recovery is relatively slow, resulting in prolonged vaginal bleeding. It is recommended to strengthen the nutrition, keep the vulva clean, oral antibiotics to prevent infection.