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Insight Horizon Media

How painful is a sigmoidoscopy?

Author

Sarah Cherry

Published Mar 15, 2026

How painful is a sigmoidoscopy?

A sigmoidoscopy can cause mild discomfort. You may feel a strong urge to have a bowel movement when the tube is inserted. You may also have brief muscle spasms or lower belly pain during the test. Taking deep breaths while the tube is being inserted may help decrease any pain.

What does a sigmoidoscopy diagnose?

During a flexible sigmoidoscopy, a healthcare provider uses a scope to view the inside of the lower (sigmoid) colon and rectum. The procedure helps diagnose bowel problems, such as ulcerative colitis, an inflammatory bowel disease (IBD). It can also detect colon polyps that can become colon cancer.

Why is a sigmoidoscopy done?

Why it’s done Your doctor may recommend a flexible sigmoidoscopy exam to: Investigate intestinal signs and symptoms. A flexible sigmoidoscopy exam can help your doctor explore possible causes of abdominal pain, rectal bleeding, changes in bowel habits, chronic diarrhea and other intestinal problems.

How long does a sigmoidoscopy take?

A sigmoidoscopy usually takes 15 to 20 minutes. When you arrive for your sigmoidoscopy, you will change into a hospital gown. The doctor will ask you to lie on your side on an exam table. They will put a sheet over your body so everything is covered except the test area.

Is a sigmoidoscopy the same as a colonoscopy?

Colonoscopy and sigmoidoscopy are screening tests that use a thin flexible tube with a camera at the end to look at the colon but differ in the areas they can see. A colonoscopy examines the entire colon, while a sigmoidoscopy covers only the lower part of the colon, also known as the rectum and sigmoid colon.

Is a sigmoidoscopy as good as a colonoscopy?

Sigmoidoscopy is just as good as colonoscopy at finding and removing precancerous colon polyps in the left side of the colon, where two out of three colon cancers arise.

Is sigmoidoscopy as good as colonoscopy?

Is sigmoidoscopy the same as colonoscopy?

What is the prep for a sigmoidoscopy?

Follow a low-residue/low-fiber diet for three days before the exam: This will produce smaller bowel movements to help prep the colon for the test. Take a strong laxative the day before the exam: This will clear the colon of any remaining residue that may interfere with the images the sigmoidoscope captures.

How painful is a flexible sigmoidoscopy without sedation?

Whether you are sedated or not, the flexible sigmoidoscopy should not cause any significant pain. The doctor will insert the scope through the rectum and into the colon. You may feel bloated or cramping while this is happening.

How safe is sigmoidoscopy?

Flexible sigmoidoscopy and biopsy are safe when performed by doctors who are specially trained and experienced in these endoscopic procedures. Complications are rare, but it’s important for you to recognize early signs of possible complications.

Do they put you to sleep for a sigmoidoscopy?

While a sigmoidoscopy only examines the lower 20 inches of the colon, a colonoscopy examines the entire colon. A colonoscopy is performed under mild sedation, but a sigmoidoscopy generally requires no sedation.