The first postoperative meal can be fluids, semi-fluids, and some patients can have a normal light diet, and what to eat is mainly related to the surgery performed by the patient. Usually, if brain surgery or gastrointestinal-related surgeries are performed, patients are required to eat fluids for a period of time after the surgery when the anesthesia is gone and the gastrointestinal function is restored. Especially for gastrointestinal surgery, due to the effect of surgery and anesthesia, generally the gastrointestinal function can only be gradually recovered two or three days after the operation, and the first meal after the operation must eat vegetable juice, watermelon juice, chicken soup, fish soup and other liquid diet. If the ordinary minor surgery, and the gastrointestinal tract also has nothing to do with the general patients after surgery can be a normal diet, keep light can be. In addition, it is not recommended to let the patient eat for two hours after the ordinary general anesthesia surgery. If the patient is under intrathecal hemihypophyseal anesthesia, it is recommended to eat and drink after four to six hours, to avoid the situation of accidental aspiration or vomiting. In addition, the first postoperative meal needs to be food that is easy to digest and absorb, avoiding spicy and stimulating, greasy diets. Diet after surgery is closely related to the patient’s surgery, and different types of surgeries have different dietary precautions, so it is recommended that patients follow the doctor’s instructions for dietary control.