Diarrhoea in patients with diabetes mellitus.

Diarrhoea in patients with diabetes mellitus may be due to anorectal or rectal dysfunction that results in incontinence, intestinal secretion or rapid intestinal transit, or may be associated with disorders that typically cause malabsorption. The latter include small bowel bacterial overgrowth, coeliac sprue and pancreatic insufficiency. A practical algorithm for diagnosis and advances in therapy is discussed.