While an uncommon occurrence, it is possible for patients diagnosed with acute pancreatitis to develop colonic ileus, obstruction, or perforation. By extension, it is also possible to develop a small bowel obstruction following an episode of acute pancreatitis.

Why ileus occurs in pancreatitis?

Paralytic ileus is a more common and less severe complication of acute pancreatitis than true mechanical obstruction. The etiology of ileus is not entirely understood but may arise from a viscerally mediated reflex within the superior mesenteric plexus secondary to retroperitoneal inflammation or transient ischemia.

How does pancreatitis affect the bowels?

Chronic pancreatitis can cause bowel movements to change or become abnormal. It may cause diarrhea, greasy stools, or foul-smelling stools.