A Flexible sigmoidoscopy is a diagnostic procedure test of the lower large bowel. It shows the rectum and lower colon. No ionising radiation when done without X-ray guidance.
General health information, not a diagnosis. In an emergency, call 102. Always consult a qualified health professional.
The rectum and lower colon.
Rectal bleeding.
Follow the centre's instructions; most need no special preparation.
No ionising radiation when done without X-ray guidance.
10 to 20 minutes. General information, not a diagnosis. Results must be interpreted by a qualified health worker.
Diagnostic procedure
Consult a doctor to interpret results — a single test does not make a diagnosis.
Uses your location once to list the nearest facilities. Nothing is stored.
What does a sigmoidoscopy show?
The rectum and lower colon.
Why is a sigmoidoscopy done?
Rectal bleeding.
How do I prepare for a sigmoidoscopy?
Follow the centre's instructions; most need no special preparation.
Does a sigmoidoscopy use radiation?
No ionising radiation when done without X-ray guidance.
How long does a sigmoidoscopy take?
10 to 20 minutes
Why is Flexible sigmoidoscopy done?
Rectal bleeding.
How do I prepare for Flexible sigmoidoscopy?
Follow the centre's instructions; most need no special preparation.
Is Flexible sigmoidoscopy safe in pregnancy?
No ionising radiation when done without X-ray guidance.
SI text CC BY 4.0; RadiologyInfo.org (ACR/RSNA) and MedlinePlus linked as references only, no text copied.