Colonic distention is a common cause of ulcerative colitis (UC), an inflammatory disease of the rectum or colon of unknown origin. It mainly involves the rectum, sigmoid colon and descending colon and is characterized by mucosal congestion, edema, multiple superficial ulcers, advanced wall thickening and luminal narrowing with polyp formation. The disease is characterized by persistent diarrhea, mucus stools, bloody or purulent stools, abdominal pain and urgency, and may be accompanied by extraintestinal manifestations such as fever, anemia, arthritis, skin lesions and liver disease. The onset of the disease is rarely acute, but most of them have a slow onset and a long course, often with recurrent episodes of variable length, also known as chronic non-specific ulcerative colitis. In the early stages, abdominal pain, diarrhea and bloody stools may occur. Abdominal pain of varying degrees is caused by spasm of the colonic muscles, distension of the colon and inflammation stimulating local sensory nerves. Abdominal distension is mostly confined to the left lower abdomen or lower abdomen, with paroxysmal mild pain. When the lesion is serious, it can present colic. 1, eat less coarse fiber food Avoid choosing coarse fiber food and processed rough food. Because a large amount of coarse fiber food will stimulate the intestinal tract and affect the absorption of nutrients, which will aggravate the condition for patients who are originally malnourished. Therefore, food fiber should be limited as much as possible, such as leeks, celery, white potatoes, radishes, coarse grains, dry beans, etc. Raw vegetables and fruits should be avoided during the active period of the disease, and can be made into vegetable water, vegetable puree, juice and fruit puree for consumption. Do not cook with large pieces of meat, but often use minced meat, diced meat, shredded meat, minced meat and steamed egg custard, boiled eggs and other forms. 2, be careful eating seafood Chinese medicine will be listed as “hair” is a certain reason, seafood protein is different from the protein in the food we often eat, some foreign protein easily cause allergies, aggravate the inflammatory reaction, so ulcerative colitis patients must be careful eating seafood. It is also not recommended to drink milk and dairy products during the disease activity. The actual fact is that you will find a lot of people who are not able to get a good deal on a lot of things. Do not consume food that is too cold or too hot either. In summer, especially to avoid eating cold drinks and food just taken out of the refrigerator. 4, should not eat greasy food ulcerative colitis diarrhea is often accompanied by fat malabsorption, severe cases accompanied by steatorrhea. Therefore the amount of dietary fat should be limited, should use less oil food and less oil cooking methods. 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.