The doctor may suspect IBS based on your symptoms and past health. There are no specific tests for IBS. Your doctor will rule out other conditions that cause similar problems.
A physical and rectal exam will be done.
IBS may be diagnosed if you had 2 or more of the following symptoms on 1 or more days a week, over the past 3 months:
- Pain relieved by a bowel movement
- Onset of symptoms with a change in stool frequency
- Onset of symptoms with a change in stool appearance
Tests may include:
- Blood tests—to rule out anemia, infection, or cancer.
- Fecal occult blood test—Tests for traces of blood in the stool. It can be done at the doctor's office or at home.
- Abdominal ultrasound—To rule out gallstones or kidney stones.
- Colonoscopy—A tube with a camera is placed through the rectum to look at the colon.
- Barium enema—An x-ray of the colon. A special dye is used to help show problem areas.
- Hydrogen breath test—Tests for bacterial overgrowth or lactose intolerance.
- Reviewer: EBSCO Medical Review Board Daus Mahnke, MD
- Review Date: 12/2018 -
- Update Date: 06/07/2019 -