Food is usually consumed after a period of time ranging from 1-2 hours after the gastroscopy. Oral lidocaine gel paste is usually given to the patient before the gastroscopy to reduce the discomfort of the patient during the operation. However, most people will feel discomfort in the throat after the operation, in which case they are not able to eat and need to wait until about 1-2 hours or until the discomfort in the throat disappears. Enteroscopy without endoscopic operation, can be normal diet without contraindications, such as biopsy endoscopic treatment, the day after the operation is advisable to low temperature fluid or semi-fluid diet or follow the doctor’s instructions. If endoscopic hemostasis, polypectomy and other treatments, postoperative need to follow the doctor’s advice fasting water, plus acid suppression drugs and mucosal protective agent treatment. And after the end of the examination must closely observe whether there is abdominal pain, abdominal distension, blood in the stool, fever and other manifestations, if necessary, must return to the hospital as soon as possible.