The general duration of vaginal bleeding after abortion is 5-7 days. It is abnormal to have vaginal bleeding even after more than 10 days. The reasons for long vaginal bleeding are: a. Residual tissue in the uterine cavity. The miscarriage is not clean and there is residual tissue in the uterine cavity, which affects the contraction of the uterus and its recovery, and there will be repeated vaginal bleeding that is not clean. Second, endometritis. There is infection in the reproductive tract after abortion, causing endometrial inflammation, and there may be long vaginal bleeding. In case of long vaginal bleeding, the patient should visit the hospital in time to have an ultrasound examination to understand the status of uterine rejuvenation. If there is still residual tissue in the uterine cavity, the uterus may be cleared again or treated conservatively with medication. If inflammation of the endometrium is considered, reduction and anti-inflammatory treatment will be given.