Dietary precautions before gastroenteroscopy include: eight hours before the examination should be fasting water, the day before the semi-liquid diet. The day before the gastroenteroscopy is recommended to eat well-digested semi-liquid food, such as rice porridge, steamed bread, etc., do not eat spicy stimulation, too greasy food, need to try to avoid eating with color, high fiber content of food, common leeks, tomatoes, sweet potatoes and so on. Dinner the day before the examination is recommended liquid diet, such as rice soup, but do not drink soy milk, milk, easy to cause bloating. You should fast for up to eight hours before the gastroenteroscopy. Gastroscopy also requires bowel cleansing, with polyethylene glycol electrolyte dispersions to induce diarrhea as directed by your doctor. It should also be noted that if there are gastric polyps and intestinal polyps intended to be removed by gastroenteroscopy, antiplatelet, anticoagulant, and blood stasis medications should be discontinued one week prior to the gastroenteroscopy. Gastroenteroscopy should be performed under the supervision of a doctor, consult your doctor for more precautions.