Is there a test to diagnose irritable bowel syndrome (IBS)?
Irritable bowel syndrome is diagnosed by excluding other GI disorders that can cause similar symptoms. A complete history and physical is taken to determine the duration and frequency of symptoms. To be diagnosed with IBS, the duration of symptoms should be at least six months and should occur at least three times a month.
A doctor may order tests, including blood tests, stool tests, X-rays, or CT scans. There is no specific finding on these tests that can confirm the diagnosis of IBS, however, other problems can be ruled out by performing them.
A doctor may also send the patient to a gastroenterologist (a specialist in the digestive system). Depending on the symptoms, an upper endoscopy and/or colonoscopy may be performed.