A residual uterine cavity of 12mmx9mm usually does not need to be cleared, and if the residual uterine cavity is short and there is no vaginal bleeding, most of it will return to normal with the next menstrual period. Abortion is a common gynecological surgery, there may be certain complications after the operation, including postoperative uterine cavity residue. If the residue in the uterine cavity after abortion is more than 2cm, it is recommended to have another surgery to clear the uterus for treatment. If the residue is around 1cm, conservative treatment is recommended, such as applying medication to activate blood circulation and remove blood stasis and shrink the uterus to promote the discharge of the residue in the uterus. If there is no large amount of vaginal bleeding after 7 days of medication, it can be observed temporarily, and ultrasound review can be done after the next menstrual period, and if the residue still exists, then it is necessary to do the surgical removal of the uterus again. In addition, after abortion, we should pay attention to warmth and hygiene, avoid eating cold and spicy food, do not have intercourse within one month, and have regular follow-up.