The common clinical causes of vomiting after surgery are as follows:1. After surgery, as the anesthetic is not completely metabolized, the clinical symptoms of nausea and vomiting may appear under the stimulating effect of anesthetic, and the symptoms of vomiting can be improved by intravenous infusion of mirex, temporary fasting and appropriate supplementation of liquid to promote rapid metabolism of anesthesia in the body.2. When tracheal intubation is carried out in the course of operation, more gases will be injected into the stomach. When tracheal intubation is performed during surgery, more gas will be injected into the stomach. When the gastrointestinal function is not fully recovered after the operation, a large amount of gas and gastric juice will be stagnated in the gastrointestinal area, causing nausea, vomiting and abdominal distension. By applying hot omelette on the abdomen and low-pressure enema, the gastrointestinal function is stimulated to recover and the intestinal contents are excreted, thus relieving the symptoms of vomiting.