Lower gastrointestinal bleeding (LGIB) refers to blood loss of recent onset originating from a site distal to the ligament of Treitz [1,2].
It is usually suspected when patients complain of
As a general rule of thumb, black tarry stool is usually caused by bleeding in the upper gastrointestinal tract (esophagus, stomach, duodenum) and red blood usually comes from the lower GI tract
GI bleeding Rainbow photo (click the link and check the color)
Black tarry : Common causes include bleeding ulcers in the stomach or duodenum.
Melenic stool is often described as glossy and sticky and has a characteristic horrible smell.
maroon stool, burgundy stool, and even mahogany stool. Dark red blood is most often a sign of colonic bleeding,
Bright red blood is usually indicative of an anorectal source of bleeding such as a hemorrhoid or anal fissure. (BRBPR=Bright red bleeding per rectum )
