Before the surgery, the patient will be injected with anesthetic drugs, but whether it is intravenous compound anesthesia or local infiltration anesthesia, a certain amount of pain will be produced in the wound at the moment of injection, but the pain will disappear more quickly. Especially when injecting local anesthetics, it is easy to produce more obvious pain in the skin injection area, and with the infiltration of drugs, the local pain will disappear, which can ensure that the patient has no obvious pain during the operation. Although intraoperative patients have no pain and can feel local stimulation such as pulling, they usually do not experience excessive discomfort. Anesthesia mainly includes local infiltration anesthesia, nerve block anesthesia, and static-inhalation complex anesthesia, etc. Different types of anesthesia are decided according to the surgical needs and sometimes according to the basic state of the patient. Local anesthesia is usually chosen for relatively minor surgeries, such as body swellings or hernias or appendices. Large surgeries, such as removal of organs from the chest, lungs or abdomen, usually require general anesthesia.