Causes of Bloody Stools (Hematochezia) are - Anal fissures - Diverticulosis - Colon polyps - Colitis - Hemorrhoids - Crohn’s disease - Rectal ulcer - Ulcerative colitis - Anal cancer - Colon cancer - Rectal cancer - Inflammatory Bowel Disease (IBD) - Bowel obstruction - Bleeding peptic ulcer - Anal sex - Anal prolapsed Diagnostic tests of Bloody Stools - Physical examination - Anoscopy - Flexible sigmoidoscopy - Colonoscopy - Small intestine endoscopy - Radionuclide scans - Visceral angiogram - MRI - CT Scan - Esophagogastroduodenoscopy - Nasogastric tube aspiration Treatment of Blood in Stools The correct diagnostic test or procedure helps find out the right cause. Once the cause of blood in stools is found your physician will present you a treatment plan accordingly.