Causes of GI bleeding

Question 1

What are the causes of upper GI bleeds?

Answer 1

Gastritis.
Peptic ulcers.
Malignancy.
Mallory-Weiss tear.
Oesophageal varices.

Question 2

What are the causes of lower GI bleeds?

Answer 2

Haemorrhoids.
Diverticulitis.
IBD (Crohn's disease, ulcerative colitis).
Malignancy.
Infectious diarrhoea.
Angiodysplasia.
Polyps.