Fever
If you feel feverish (remember, this is a temperature above 100.4 ° F/38 ° C) or if you have night sweats, the cause may be ulcerative colitis. Just as when your immune system is flying into action to combat a virus or bacteria, often raising your temperature. Similarly, ulcerative colitis flares can trigger the same response as your body is trying to deal with all that inflammation. Usually, whether your temperature is 103 ° F or higher or you have had a fever for more than three days, you don’t have to call your doctor about a fever. But if your fever is associated with ulcerative colitis, you will probably also have other symptoms.