The dietary principles of ulcerative colitis are high in calories, high in protein, high in vitamins, and low in oil and dregs. The following are some of the contraindications that need to be noted. Ulcerative colitis is a chronic inflammatory disease of the rectum and colon. Diarrhea, abdominal pain, stools often accompanied by mucus and pus and blood are common symptoms of ulcerative colitis 2 to 4 times a day, and in severe cases up to 10 times or more. The disease varies in severity and is recurrent or prolonged in a chronic fashion. Patients are often malnourished, emaciated and anemic. The proteins in seafood are different from the proteins in the foods we often eat, and certain xenobiotics are prone to cause allergies and aggravate inflammatory reactions, so ulcerative colitis patients must be cautious about eating seafood. Milk and dairy products are also not recommended during the active phase of the disease. In the process of dietary regimen, patients and their families should pay attention to the condition: which foods work well for patients, and which foods patients feel uncomfortable or have allergic reactions after eating. The experience should be summarized in time and the suitable diet should be constantly explored. Eat less coarse fiber food Food fiber should be limited as much as possible, such as leek, celery, white potatoes, radish, coarse grains, dry beans, etc. It is not advisable to eat fatty foods The diarrhea of ulcerative colitis is often accompanied by fat malabsorption, and in severe cases, by steatorrhea. Therefore, the amount of dietary fat should be limited, and less oily food and less oily cooking methods should be used. For those with steatorrhea, medium-chain fatty acid fats, such as coconut oil, can be used. Diarrhea should not eat oily food and fried food, cooking all kinds of dishes should be as little oil as possible, and often use methods such as steaming, boiling, stewing, blanching, stewing and water-slide. The actual fact is that you will not be able to get a good deal on your own. Do not eat too cold or too hot food either. It is especially important to avoid cold drinks and food just taken out of the refrigerator in summer. In short, ulcerative colitis patients should choose soft, light, less residue, easy to digest, rich in nutrients, have enough calories food, a small number of meals, in the acute exacerbation and outbreak type cases, severe cases should be fasting for the first few days, available intravenous high nutrition therapy, so that the intestine to rest, after the symptoms improve can gradually transition to fluid, no residue or less residue semi-liquid, etc..