Generally speaking, vaginal bleeding can be cleared in 7-10 days after the abortion surgery, and the longest period should not exceed half a month. The amount of bleeding gradually decreases from a large amount, and the color of the bleeding gradually changes from bright red to dark and finally to brown. If the patient after the abortion, the vaginal bleeding time more than half a month, the bleeding gradually increased or did not significantly reduce, the color of the bleeding has been bright red, we should consider the abnormal vaginal bleeding. In this case, the main consideration is the possibility of uterine residue, poor uterine recuperation, uterine infection, and trophoblastic disease. Therefore, the patient must have ultrasound, blood chorionic gonadotropin, routine blood test and gynecological internal examination and other related tests to make a differential diagnosis. In addition, regardless of whether the patient’s bleeding clears on time or not, the ultrasound should be repeated in about 1 week, mainly to observe whether there is any uterine cavity residue and the uterine recuperation.