You can usually eat buns on the third day after having a colonoscopy biopsy. After the colonoscopy biopsy, because of its trauma, need to fast for a period of time, so as not to stimulate the secretion of digestive juices from food, causing damage to the trauma, so that the wound healing is slowed down. Generally speaking, the biopsy wound is very small, after the colonoscopy fasting 6 hours can start to eat, eat light, easy to digest fluid food, such as millet porridge, rice soup, etc., and then slowly transition to a normal diet. It should be noted that colonoscopy for intravenous general anesthesia, intestinal function needs some time to recover, after the colonoscopy should not eat indigestible food, in order to avoid indigestion, resulting in abdominal pain and bloating. And because when doing colonoscopy in order to have a better view, it will be pumped into the intestines, the excess gas will make people uncomfortable, so you should avoid eating gas-producing food after the operation, such as milk, beans, carbonated beverages and so on. Generally after the colonoscopy biopsy third day has resumed normal diet, no special dietary contraindications, is able to eat steamed bread. Enteroscopy is not only a means of examination, but also in the enteroscopy treatment of disease. Therefore, the diet after colonoscopy is related to whether or not the operation is performed during the colonoscopy process, and you should listen to the professional doctor’s advice to have a reasonable diet, and avoid eating at will on your own.