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What is a flexible sigmoidoscopy?
Flexible sigmoidoscopy is a procedure used to examine the lower portion of the large bowel, the rectum and sigmoid colon, using a thin, flexible camera passed gently through the rectum, and it provides a very accurate view of the left side of the bowel where many problems occur (North Bristol NHS Trust, 2026). It is a shorter, more targeted alternative to a full colonoscopy, often used to investigate symptoms confined to the lower bowel, such as rectal bleeding, altered bowel habit, or lower abdominal pain.
Patients across Newcastle upon Tyne, Durham, North Tyneside, Gateshead and Sunderland choose Dr Kejariwal for flexible sigmoidoscopy because of his 18+ years of consultant experience in endoscopic procedures. The examination allows direct visualisation of the lower bowel lining, with the ability to take biopsies or remove small polyps at the same time, providing a quick and effective route to diagnosis for many lower bowel symptoms.
Flexible sigmoidoscopy versus colonoscopy
Because a flexible sigmoidoscopy only examines the lower part of the bowel, it typically requires simpler preparation and takes less time than a full colonoscopy, making it a practical first-line test for symptoms clearly localised to the lower bowel. However, if the examination reveals an abnormality, or if your symptoms suggest the whole bowel needs checking, Dr Kejariwal may recommend proceeding to a full colonoscopy to ensure nothing further up the bowel is missed.
Preparation
Preparation for a flexible sigmoidoscopy is generally simpler than for a full colonoscopy, often involving one or two enemas taken shortly before the procedure rather than a full bowel-cleansing regime, though this can vary depending on your individual circumstances. Full, tailored written instructions will be sent with your appointment confirmation and repeated by the clinical team beforehand.
What happens on the day
01
Arrival & preparation
Check in at Cobalt Hospital day unit, where the team confirms your consent, completes any final bowel preparation, and discusses sedation options with you.
02
The procedure
The examination usually takes between 10 and 20 minutes. Dr Kejariwal personally examines the rectum and sigmoid colon, taking biopsies or removing small polyps where appropriate.
03
Recovery
A short rest in the recovery bay follows, with additional time if sedation has been used. Most patients feel able to resume normal activities quickly afterwards.
04
Results, the same day
Dr Kejariwal discusses his findings with you before you leave, with a written report sent to you and your GP, and biopsy results typically available within one to two weeks.
Risks and safety
Flexible sigmoidoscopy is a safe, well-tolerated procedure with a low risk of complications. Possible risks include mild bloating, discomfort, or a small risk of bleeding, particularly if a polyp is removed. Serious complications such as perforation are rare, occurring in approximately 1 in 15,000 examinations. Dr Kejariwal will discuss the specific risks relevant to you during the consent process, so you feel fully informed and confident before proceeding.
Your results
Findings are explained by Dr Kejariwal on the day of your procedure, with a written report sent to you and your GP. Where biopsies or polyps have been taken for analysis, results are typically available within one to two weeks, along with a clear plan for any further investigation or treatment.
Frequently asked questions about flexible sigmoidoscopy
What is a flexible sigmoidoscopy used for?
A flexible sigmoidoscopy is used to examine the rectum and lower part of the large bowel, investigating symptoms such as rectal bleeding, altered bowel habit, or lower abdominal pain, and allowing biopsies or polyp removal at the same time.
What is the difference between a flexible sigmoidoscopy and a colonoscopy?
A flexible sigmoidoscopy examines only the lower part of the bowel (rectum and sigmoid colon), while a colonoscopy examines the entire large bowel. Your consultant will advise which is most appropriate for your symptoms.
Is preparation easier for a flexible sigmoidoscopy than a colonoscopy?
Yes, preparation is usually simpler, often involving one or two enemas rather than a full bowel-cleansing regime, though this depends on individual circumstances.
Is a flexible sigmoidoscopy painful?
Most patients experience mild pressure or bloating rather than pain, and sedation can be discussed if you would prefer to be more relaxed.
When will I get my flexible sigmoidoscopy results?
Initial findings are shared with you on the day of your procedure, with biopsy results, if taken, typically available within one to two weeks.
Usually seen within 1-2 weeks
Referral routes: GP, self-referral or insurer. Bupa recognised, fee assured.
About Dr Deepak Kejariwal
Consultant Gastroenterologist & General Physician, FHEA, with 18+ years of consultant experience in gastroenterology and endoscopy, including flexible sigmoidoscopy. Serving Newcastle upon Tyne, Durham, North Tyneside, Gateshead and Sunderland.