Generally to do clearance surgery if you do anesthesia, you can choose local anesthesia, or you can not choose anesthesia directly clear. Intravenous anesthetics, mild painkillers are given, as there are different kinds of pain, with different intensities, so different painkillers are given. Nerve block anesthesia can be done or sacral block anesthesia can be given. There are three types of intravertebral anesthesia, subarachnoid block, epidural block and sacral plexus block. In the past, the sacral block was more effective in clearing the uterus and had a lesser impact on the patient, but for sacral plexus block, there are more patients who are difficult to tie and operate. Some parts of the sacral canal are closed, and it is not good to find the position, so now in most cases, we choose intravenous anesthesia, so that the patient is quiet and asleep.