It is true that the second time is more painful than the first time because the endometrium of the uterus has been damaged for the second time and the residual tissues in the uterine cavity are harder and more mechanized, which makes it difficult to clear the uterus, so the doctor may use more force in the process of clearing the uterus than the first time, so the patient will feel more painful for the second time. The second time the uterus can be cleaned painlessly, preoperative examination, routine blood tests, infectious disease tests, liver and kidney function tests, blood sugar, lipid tests, etc., can be 4-6 hours before the operation fasting water, sedation propofol, even in order to clean at once, you can give mifepristone oral three days in advance, before cleaning the uterus can be given vaginal misoprostol vaginal drug, in the time of cleaning the uterus The patient may be more favorable for a one-time cleanse. In addition, a painless curettage is not too painful for the patient.