Abdominal Cancer Day - Bright red blood usually means bleeding that's low in your colon or rectum. Dark red or maroon blood can mean that you have bleeding higher in the colon
What can Blood in the Stool Tell us? - Vejthani Hospital | JCI Accredited International Hospital in Bangkok, Thailand.
Blood in stool over and over again?: Gastro Office: Gastroenterologists
Invisible Blood in Stool Linked to Various Diseases | GI Associates