After appendicitis surgery, not to eat or drink before bowel movement is to wait for the intestinal tract to resume movement, and then start eating after the digestive function is restored, to avoid causing adverse phenomena to occur. Because appendicitis surgery is a traumatic operation, intraoperative bleeding, irritation and so on for the organism is also a blow injury, will affect the peristalsis of the intestinal tract and digestion; secondly, the operation requires general anesthesia, after anesthesia, peristalsis of the intestinal tract and digestive function will be greatly inhibited, and it also needs a certain amount of time to recover after the operation; the patient’s search for the appendix during the operation will be a stimulus for the intestines in the abdominal cavity and the omentum as well. Therefore, the intestinal tract needs some time to recover normal peristalsis, digestion, absorption and other functions after appendicitis surgery, and no food can be eaten before that, which can be supplemented by parenteral nutrition. After the intestinal function is gradually restored and the bowel movement and defecation start, normal diet can be resumed gradually.