MedlinePlus Health Topics
disease topic
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Small Intestine Disorders
Source: MedlinePlus Health Topics, U.S. National Library of Medicine
Last synced 8/6/2026Status: primary verified
Your small intestine is the longest part of your digestive system - about twenty feet long! It connects your stomach to your large intestine (or colon) and folds many times to fit inside your abdomen. Your small intestine does most of the digesting of the foods you eat. It has three areas called the duodenum, the ileum, and the jejunum. Problems with the small intestine can include: Bleeding Celiac disease Crohn's disease Infections Intestinal cancer Intestinal obstruction Irritable bowel syndrome Ulcers, such as peptic ulcer Treatment of disorders of the small intestine depends on the cause.
Educational only
This information is for general education and is not medical advice. Always talk to a licensed U.S. clinician about your situation, medications, or treatment decisions.