The hazards of purging the uterus are mainly prone to excessive damage to the endometrium, leading to amenorrhea, uterine adhesions, which can easily lead to menstrual irregularities. The procedure may lead to perforation of the uterus, damage to the pelvic organs, and in severe cases, life-threatening hemorrhagic shock. However, most of the current procedures are performed under ultrasound monitoring, which is relatively safe. If there are abnormal residues in the uterine cavity, it is not possible to not clear the uterus, and routinely give anti-inflammatory treatment to stop bleeding and symptomatic treatment after the operation. Usually also do a good job of contraception, try to avoid incomplete abortion, because the abortion itself may have residual, may need a second clearance, the uterus is a certain damage.