The dietary combination for patients with enteritis needs to be scientific. In traditional Chinese medicine, it is believed that rectal inflammation is related to "internal damp-heat", "food stagnation", "spleen and stomach weakness", and "parasitic dampness stagnation". Patients with rectal inflammation should pay attention to the details of their diet: 1. High calorie and high protein intake to compensate for the nutritional consumption caused by long-term diarrhea. The supply can be gradually increased according to the patient's digestive absorption tolerance. Generally, calories are supplied at 40 kcal per kilogram of body weight per day. Protein is supplied at 1.5 grams per kilogram of body weight per day, with 50% being high-quality protein being ideal. 2. Adequate vitamins and inorganic salts to compensate for the nutritional loss caused by diarrhea. 3. Limit fat and dietary fiber: Diarrhea is often accompanied by poor fat absorption, and severe cases may have fat diarrhea. Therefore, the amount of dietary fat must be restricted, and low-oil foods and cooking methods should be adopted. For those with fat diarrhea, medium-chain fatty acid oil can be used. Avoid eating stimulating and high-fiber foods, such as spicy foods, sweet potatoes, radishes, celery, raw vegetables, fruits, and stimulating ingredients like green onions, ginger, garlic, coarse grains, dry beans, etc. 4. Eat small meals frequently: To reduce the burden on the intestines, adopt a method of eating small meals frequently to supplement nutrient intake. 5. Dietary arrangements: (1). During acute rectal inflammation or before and after surgery, use liquid or low-residue semi-liquid diets. Food content includes rice soup, steamed eggs, tapioca starch, milk, etc., which are generally not recommended. Vegetable and fruit intake must be prohibited. They can be processed into vegetable water, vegetable puree, fruit juice, fruit puree, jelly, etc., for consumption. Low-residue semi-liquids can include high-quality protein sources like fish, lean meat, and eggs made into soft, low-oil foods, such as poached fish balls, egg drop porridge, chicken noodle soup, and bread; (2). For severe cases where oral intake is not possible, tube feeding with elemental diets or intravenous nutrition support can be used, and gradually increase the intake of natural foods as the nutritional status improves.