Whether oats and milk powder can be eaten after gastroenteroscopy should be assessed according to the examination results. If the gastroenteroscopy is normal, oats and milk powder can be eaten; if polyps are found during the examination and after surgery, they cannot be eaten. If the gastroenteroscopy is normal, you can have a normal diet after the examination, and there is no strict regulation on the type of diet; however, if polyps are found during the gastroenteroscopy, according to the size of the polyps, the general polyp clamping, and the amount of polyps is not too much, the diet does not have much impact, and if the trauma is relatively large after EMR, ESD surgery, you need to fasting or a liquid diet. Whether oatmeal and powdered milk can be eaten after gastroenteroscopy should seek the help of a doctor and follow the advice of a specialist.