After gastroscopy and colonoscopy under general anesthesia the time allowed to eat is approximately 2 hours to 72 hours depending on the condition. Please follow your physician’s instructions for details. The time for eating after gastroscopy and colonoscopy under general anesthesia is mainly related to the treatment taken during the gastroenteroscopy according to the condition. If only painless gastroscopy and colonoscopy are performed, diet can be resumed 2 hours after the examination. If endoscopic mucosal resection is performed, 24 hours of water fasting is routinely required. If the wound is large, bleeding is high, or endoscopic mucosal dissection is performed, then fasting for 72 hours, depending on the doctor’s advice. The above recovery diet time can be adjusted according to the patient’s specific situation, and those who perform painless gastroenteroscopy can eat time should strictly follow the doctor’s instructions, and be rehydrated during the period of fasting and water treatment. The recovery diet should be transitioned from liquid to semi-liquid diet until normal diet is resumed, and attention should be paid to the observation of abdominal pain, vomiting blood, blood in stool and other discomforts.