Dietary treatment, dietary principles and requirements of ulcerative colitis: Ulcerative colitis is a chronic inflammatory disease of the colon of unknown origin. The lesions are mainly limited to the mucosa of the colon and are predominantly ulcerated. The main symptom is abdominal pain and diarrhea, and the stool is often accompanied by blood pus and mucus. The stools may occur 2 to 4 times a day, or up to 10 times a day in severe cases. Patients are often malnourished, lean and anemic. Because ulcerative colitis is a chronic disease and requires long-term treatment, nutrition and diet are important. The general principle is high calorie, high protein, high vitamin, less oil and less dregs diet.