hello, Colitis is inflammation of the inner lining of the colon. It may cause abdominal pain and diarrhea with or without blood. Fever may be present. There are numerous causes of colitis including infection, inflammatory bowel disease, ischemic, and microscopic colitis.The ulcers bleed and produce pus and mucus. Symptoms of ulcerative colitis include abdominal pain, diarrhea, rectal bleeding, a recurrent urge to have a bowel movement (tenesmus), lack of appetite, fever, and fatigue. Abdominal pain, diarrhea, and bloody bowel movements are the hallmark of the disease.With the right antibiotics, this type of colitis is curable and rarely results in long term complications. A chronic colitis is often caused by an autoimmune disease. Collectively they are called Inflammatory Bowel Disease (IBD). They are subdivided into Crohn's disease and Ulcerative colitis. please consult gastroenterologist for proper diagnosis.