Colitis refers to an inflammatory response of the colonic mucosa, where inflammatory cells are present in the colonic mucosa, damaging it and impairing functions such as the colonic mucosa and colonic bowel motility. The corresponding symptoms of colitis are associated with these changes. The corresponding clinical symptoms are mainly inflammatory symptoms of the intestinal tract, but can also be accompanied or not accompanied by systemic symptoms. The symptoms of colitis are: 1. Diarrhea: Diarrhea is the most typical symptom of colitis, because of the different causes of colitis, the stool can be mucus bloody stool, watery stool, thin stool, etc. While chronic diarrhea symptoms vary in severity, patients with mild symptoms have diarrhea 1 to 2 times a day, while severe patients have dozens of stools. Rarely, patients with colitis also have symptoms of constipation; 2, abdominal pain: abdominal pain in patients with acute inflammatory bowel disease is often heavy, colic, aggravated before the diarrhea. 3, the urgency: even after still have the desire to stool, rectal down feeling, the feeling of incomplete stool. Generally suggest that the rectal inflammation is more serious. 4, feces with blood: even pus and blood stool or blood stool. Chronic inflammation with blood in the stool over a long period of time can lead to anemia. Other symptoms may include malaise, lethargy, fever, and other systemic symptoms. Colitis usually manifests as diarrhea, abdominal pain, or alternating diarrhea and constipation. Colitis can be managed with dietary modifications and medication or surgery. Early detection, early treatment, once the symptoms appear timely treatment to the regular hospital.