The benefits of purging are removing residual tissue from the uterus to avoid infection, uterine adhesions, etc., and the disadvantages include damage to the endometrial tissue and other bad things. 1.Benefits: . Cleansing the uterus is commonly used in the clinic for patients with incomplete abortion, which can help patients remove the residual pregnancy material in the uterine cavity, reduce the continued bleeding, promote the recovery of the uterus, avoid causing abortion, infection caused by endometritis, pelvic inflammatory disease, uterine adhesions and so on. 2. The bad side: because of a kind of invasive operation, purging has caused endometrial damage, incomplete purging, bleeding, perforation, menstrual disorders, secondary infertility and other bad sides, but the chance of occurrence is very low, the specific probability of size of the existence of individual differences. The clearance of the uterus should be carried out under the operation of a specialized physician, which can reduce the risk and avoid the adverse consequences.