Diagnosing Irritable Bowel Syndrome
Blood tests are ordered to see if you are losing large amounts of blood in your stool and to check for infection or other problems.
A stool sample is ordered to check for signs of intestinal bleeding or infection.
Special x-rays may be recommended to look for inflammation, sores, or other problems in the digestive tract.
A flexible sigmoidoscopy is a procedure where a soft, bendable tube with a camera on it is inserted through your anus to check for sores and inflammation in the rectum and part of the large intestine.
Colonoscopy is a procedure similar to sigmoidoscopy, except that the whole colon is examined instead of just a portion of it.