It is called a painless operation when the patient is under intravenous anesthesia. The patient will feel like sleeping when under intravenous anesthesia, so there will be no pain when doing the operation. It is much more damaging to the patient than the general uterus removal surgery, mainly in the following two aspects: First, when intravenous anesthesia is used for painless uterus removal surgery, many patients are allergic to the anesthetic drugs, so they may suffer from anaphylactic shock. In addition, if the anesthesia is too deep, the patient may suffer from respiratory or cardiac arrest. Secondly, during painless uterine removal surgery, patients do not feel any pain if perforation or excessive scraping of the endometrium occurs during the surgery because they do not have any sensation.