Digestive dysfunction, gluten allergy people, diabetics, etc. need to eat less or not eat oatmeal. 1. Digestive dysfunction: oatmeal processing is relatively simple, high dietary fiber content. Gastritis, peptic ulcer and other gastrointestinal function of the weak people after eating oatmeal can increase the burden of gastrointestinal digestion, aggravate indigestion (such as constipation, bloating, etc.) symptoms. 2. Gluten-allergic people: oats contain a large amount of gluten, gluten-allergic people who consume oats will have hives, abdominal pain, nausea, diarrhea and other allergic reactions, so gluten-allergic people try not to consume oatmeal. 3. Diabetic patients: oatmeal is rich in starch, which can be converted into glucose after digestion and absorption by the human body, causing elevated blood sugar. So diabetic patients try to consume less oatmeal, for sugar refining processed oatmeal need to avoid eating. Most people can eat oatmeal in normal moderation, for those who can not eat oatmeal can choose yam, potato and other foods for nutritional replacement, for individualized diet, it is recommended to consult a professional nutritionist to develop.