Chronic ulcerative colitis is a chronic disease of unknown origin, with the main clinical manifestations being diarrhea, mucopurulent stools, abdominal pain and urgency, with varying degrees of severity. Its etiology is still unclear. Scholars believe that ulcerative knot is an autoimmune disease country, immune factors and the main cause of this disease, psychological factors have some relationship with this life. It has been found clinically that patients with this disease have anxiety, nervousness and plant nerve dysfunction. It has also been proposed that the pathogenesis of ulcerative colitis is the result of a triad of exogenous substances causing a host response, genetic and immune effects. As a result of host hypersensitivity to exogenous antigens, any injury that increases mucosal permeability to these antigens may induce an inflammatory response in the intestinal wall once immune activation in the intestine is established. The prevention of ulcerative colitis is difficult and can be regulated only by diet. The actual fact is that you should be able to get a good deal on a lot of the things that you need to do. Once you have intestinal infection, treat it as early as possible.