Irritable bowel syndrome

DDx

Chronic diarrhea due to other causes, eg, lactase deficiency, parasites, celiac sprue, laxative abuse, bacterial overgrowth
Constipation due to other causes, eg, hypothyroidism
Inflammatory bowel disease
Intestinal ischemia
Diverticular disease
Peptic ulcer disease
Functional or nonulcer dyspepsia
Colon cancer
Endometriosis
Depression or anxiety
Physical or sexual abuse

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