Patients with cholecystitis and gallstones sometimes have nausea and vomiting during surgery. There are many reasons for nausea and vomiting, such as pulling the internal organs during surgery and anesthesia, stimulating the abdominal cavity, and using pethidine, morphine and other analgesic drugs to stimulate the vomiting axis. In addition, the balance of water and electrolyte is disordered, and hypoxemia and hypoxia often stop on their own.