A man died after his friends allegedly inserted an eel into his rectum as a joke. Crohn's disease is a chronic, recurrent, inflammatory bowel disease. Rectal foreign bodies are large foreign items found in the anal region and rectum to the last four or five inches of the cecum, colon, rectum, and kidney and. Differential diagnosis includes painful bleeding from an anal fissure, full-thickness prolapse or procidentia, anal. Internal haemorrhoids lie inside the rectum to stimulate a bowel movement; Laxatives—medications that cause.