A sigmoidoscopy is a diagnostic test used to check the sigmoid colon, which is the lower part of your colon or large intestine. This section of your colon is close to your rectum and anus. A sigmoidoscopy can help diagnose the following symptoms: Diarrhea. Belly pain.

What is the difference between a sigmoidoscopy and colonoscopy?

The difference between the two tests is the part of the colon they allow the doctor to see. A sigmoidoscopy is less invasive, because it only looks at the lower part of your colon. A colonoscopy looks at the entire large intestine.

How long does a sigmoidoscopy take?

A flexible sigmoidoscopy exam typically takes about 15 minutes. It may require slightly more time if biopsies are taken. Sedation and pain medications usually aren't necessary.