Short Bowel Syndrome

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Overview

• What is short bowel syndrome?

  Short bowel syndrome is a condition where you do not have enough healthy small intestine. The foods we eat pass through the stomach into the small intestine. The job of the small intestine is to absorb nutrients from the food. In short bowel syndrome, water and nutrients are not absorbed well, leading to diarrhea and weight loss. How short bowel syndrome affects you depends on how much intestine remains and which parts of the small intestine are affected.

Symptoms

• What are the signs and symptoms of short bowel syndrome?

  Common problems associated with short bowel syndrome include:

  • Frequent or watery stools
  • Weight loss
  • Feeling thirsty, tired and weak
  • Muscle cramps
  • Less urine or dark urine
  • Low vitamin and mineral levels
• When should I call my doctor?

  Call your doctor if you have much more diarrhea than usual, very little urine, severe thirst, dizziness or losing weight fast. These are the signs that your body is losing too much water or nutrients.

Causes and Risk Factors

• What causes short bowel syndrome?

  Short bowel syndrome usually occurs after a large part of the intestine is removed during surgery. Common reasons for surgery that may lead to short bowel syndrome include blocked or damaged intestine, poor blood flow, Crohn’s disease, cancer, or other bowel problems. The risk of developing short bowel syndrome after surgery depends on how much intestine remains and how well it works.

Diagnosis

• How is short bowel syndrome diagnosed?

  Short bowel syndrome is diagnosed in those who develop symptoms of weight loss, diarrhea, dehydration, or vitamin deficiencies after surgery. Your doctor will review your symptoms, weight, abdominal surgeries, and eating habits. Testing of your blood, urine, and stool can show if you are getting enough water, vitamins, and minerals.

Treatment

• How is short bowel syndrome treated?

  Treatment helps you get enough fluids and nutrients while making the most of your remaining intestine. This includes:

  • Changes in diet and fluid intake
  • Taking extra vitamins or minerals
  • Medicines to slow diarrhea
  • Medicines to help your intestine absorb more nutrients from your food

  Even with these treatments, many people cannot take in enough nutrition by mouth to remain healthy. Additional fluids, vitamins, and other nutrients can be given as an infusion called total parenteral nutrition (TPN).

• Can my intestines improve over time?

  Yes. After surgery, your intestines can change to absorb more water and nutrients. This is called intestinal adaptation. Your diet and medicines can help your intestine make the most of this natural process.

• What should I eat if I have short bowel syndrome?

  There is no single diet for short bowel syndrome. Many people do better with smaller meals several times a day. Exactly what you should eat depends on what healthy parts of your intestine remain. Your care team or dietitian can make an eating plan that best meets your needs.

• What should I drink if I have short bowel syndrome?

  While thirst is common with short bowel syndrome, drinking more water may not always help. Some people need a special drink that contains the right amount of water, salt, and sugar.

• How can I prevent dehydration?

  Watch for thirst, dry mouth, dizziness, dark urine, or less urine than usual. Your team may ask you to track your weight and urine. This can help identify fluid loss early.

Author(s) and Publication Date(s)

Christopher Schmoyer, MD, Penn Presbyterian Medical Center, Philadelphia, PA and Roopa Vemulapalli, MD, UT Southwestern, Dallas, TX – Published September 2026.

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