Loss of blood from the<unk>  tract distal to the ligament of Treitz
Upper GI bleeds are most common source for blood detected in the<unk>  GI system
80% of<unk>  will resolve spontaneously[citation needed]
Cause of bleeding found in <50% of cases[citation needed]
Diverticulosis cause majority, other conditions include colitis, polyps, colorectal cancer, hemorrhoids, anal fissures
Hematochezia originates from briskly bleeding upper GI source in 10-15% of cases[citation needed]
Diverticulosis cause majority, other conditions include colitis, polyps, colorectal cancer, hemorrhoids, anal fissures
Salicylates
NSAIDs
Warfarin
Lower gastrointestinal bleeding
Upper GI Bleeding
Gastrointestinal bleeding 
Diverticular disease
Colitis
Diverticulosis
Leaking G-tube
Diverticulitis