What are the symptoms of an obstructed bowel and how is it diagnosed?

Reviewed by Yoshinori Abe, MD

Internal Medicine

An obstructed bowel occurs when a blockage prevents food or waste from moving through the intestines. Common symptoms include abdominal pain, nausea, vomiting, bloating, fever, and an inability to pass stool or gas. Causes range from scar tissue and hernias to tumors or impacted stool. Doctors typically diagnose bowel obstructions using imaging tests such as X-rays, CT scans, or ultrasounds to locate the blockage and determine severity.

Because bowel obstruction symptoms can overlap with many other digestive conditions—some minor, some serious—it's important to identify what may be causing your discomfort before deciding on next steps. A free, instant, online symptom check can help you understand your symptoms, narrow down possible causes, and guide you toward the appropriate level of care—all in just a few minutes.

Reviewed for medical accuracy: 07/14/2026

Important Next Steps

Learn if bowel blockage symptoms need care now Discover likely causes of obstructed bowel symptoms See whether your symptoms could be serious Find OTC options for nausea or constipation Find a doctor for bowel obstruction symptoms Understand medically backed home care for bowel symptoms Find out if bowel symptoms need urgent care

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Explanation

When someone has an obstructed bowel, they may feel stomach pain that comes in waves, and their belly might swell or feel very full. They can also feel sick and may throw up. Sometimes, the person has trouble passing gas or having a bowel movement. In small bowel obstruction, vomiting is very common, while large bowel obstruction often causes severe bloating and changes in bowel habits.

If you're experiencing any of these symptoms, you can check them right away with Ubie's free AI-powered symptom checker to better understand what might be causing your discomfort. To diagnose the problem, doctors first ask about the symptoms and then use special pictures of the inside of the belly. An X-ray can show signs of blockage, and a CT scan gives a more detailed view to see exactly where the blockage is and if there is any damage to the intestine. These tests help the doctor decide the best way to treat the problem, whether it is with medicine or sometimes surgery. This clear step-by-step approach is important because quick treatment can prevent further problems in the intestines.

(References)

Updated 2025 Jan 19]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK448079/
Updated 2024 Nov 9]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK441888/
Jackson P, Vigiola Cruz M. Intestinal Obstruction: Evaluation and Management. Am Fam Physician. 2018 Sep 15;98(6):362-367. PMID: 30215917.

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