Bloody stool is the most common symptom of ulcerative colitis, a form of Irritable Bowel Disease (IBD). Diarrhea, abdominal and/or rectal pain, fever, and weight loss are other symptoms.
Some patients complain of constipation and rectal spasm. Arthritis symptoms may occur in as many as 25 percent of patients with ulcerative colitis, and eye problems may develop in about 5 percent. Skin changes can also occur.