Bowel bleeding is a popular term for rectal bleeding what refers to blood in the bowel movement.
These terms only mean that blood comes out from the bowel/rectum, but actual origin of the blood may be in the bowel (small/large intestine, rectum), stomach, esophagus, throat, mouth, nose, para-nasal sinuses or even lungs – so any site from where blood may flow into the bowel.
