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US doctor explains why colonoscopy preparation can feel worse than the procedure itself: ‘Not painful, but exhausting'

Dr Sood shares why colonoscopy prep can be an uncomfortable experience, but is absolutely necessary for the procedure to have the intended result. 

Updated on: Jan 6, 2026, 17:48:23 IST
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Colonoscopy is the examination of the insides of the large intestine (colon), which includes the colon, rectum, and anus. While the invasive procedure often worries people, those who actually undergo a colonoscopy often state that the preparation ahead is worse than the procedure itself.

A day before a colonoscopy, patients have to switch their diets to only intake clear liquids. (Pexel)
A day before a colonoscopy, patients have to switch their diets to only intake clear liquids. (Pexel)

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Taking to Instagram on January 6, Dr Kunal Sood, Maryland-based physician in Anesthesiology and Interventional Pain Medicine, explained that the claim actually holds merit.

Why colonoscopy prep is uncomfortable

“Colonoscopy prep is all about cleaning out the colon so doctors can see the lining clearly during the procedure,” stated Dr Sood.

Individuals about to undergo a colonoscopy need to stop eating solid food the day before the procedure and consume only clear liquids. Then they are provided with a strong laxative solution with the goal of flushing everything out.

“Over the next several hours, it causes frequent diarrhoea until the stool runs clear,” noted Dr Sood. “It's not painful, but it can be exhausting and uncomfortable with constant bathroom trips. It can also cause bloating, nausea, and sometimes chills.”

Why proper prep is essential before colonoscopy

According to Dr Sood, a clear colon makes the colonoscopy test safer and more accurate. It helps to prevent colorectal cancer and recognise problems at an early stage when they are most treatable.

“Colonoscopy prep clears the colon so doctors can detect even the smallest polyps or cancers. It means a day of clear liquids, strong laxatives, and frequent bathroom trips,” he observed. “It’s uncomfortable, but crucial for an accurate exam. The cleaner the colon, the better the results.”

“If the prep isn't done well, doctors can miss polyps or early cancers, and the procedure may even need to be repeated,” he cautioned.

However, the doctor noted that the procedure itself is “usually quick and well-tolerated.” It is often performed when the patient is under sedation, and most people feel fine afterwards.

Note to readers: This article is for informational purposes only and not a substitute for professional medical advice. Always seek the advice of your doctor with any questions about a medical condition.

This report is based on user-generated content from social media. HT.com has not independently verified the claims and does not endorse them.

  • Debapriya Bhattacharya
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    Debapriya Bhattacharya

    Debapriya Bhattacharya is a Content Producer at Hindustan Times. He started his career in 2022, working in newsrooms in beats like education, US news, trending stories, and entertainment. In his new role in the lifestyle desk, he seeks to deliver a balanced blend of research-driven reporting and creative storytelling from health and recipes to art and culture. Science, philosophy, food and pop culture are what pump his veins and help bring heart to his stories. Debapriya tries to see out subjects that will allow him and readers to explore new frontiers and improve the quality of life for all. The explorations can be both external and internal, as thoughts seek to be as chaotic as the greater universe. As a citizen of the world, Debapriya has been fascinated by the lives of people across the globe throughout time. His curiosity leads him to explore new linguistic and cultural landscapes to broaden his horizons and deepen his understanding of global narratives. Beyond the newsroom, Debapriya loves to participate in debate and theatre, spaces that he considers to be holy grounds for nuance and self-expression. A graduate from Ashutosh College, University of Calcutta, Debapriya completed his Master's degree from the same university in 2022. An ambiverted bibliophile, he loves his solitude as much as he adores stimulating conversations. And despite his reverence for tech, libraries continue to be his favourite place for research.Read More

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