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Colonoscopies: Everything you need to know, but don’t want to ask

Posted Date: 3/3/2026

When it comes to colonoscopies, sometimes the things you want to know may be uncomfortable to ask. So, we sat down with Dr. John Nasr and discussed some of the most common concerns his patients have.

 

Why do I need a colonoscopy?

Colonoscopy is the best way to screen for colon cancer. Polyps, which are small growths that can turn into cancer over time, can be removed during the same procedure. Removing them early helps prevent colon cancer before it starts.

 

When should I start colon cancer screening?

Most people should begin colon cancer screening at age 45. If you have a family history of colon cancer, you may need to start earlier. I recommend talking with your primary care provider to decide the best plan for you.

 

Is the preparation really that bad?

This is one of the biggest worries I hear from patients. The good news is that preparation has improved a lot over the years. Many options now require less liquid and taste better than older preparations. While it may not be fun, most patients say it is easier than they expected.

 

Will the procedure hurt?

No. Colonoscopy is done under moderate sedation. You should not feel pain and usually will not remember the procedure at all.

 

Why is screening important if I feel fine?

Colon cancer often does not cause symptoms in the early stages. Screening helps us find polyps before they cause problems. That is why colonoscopy is important even if you feel healthy.

 

What if you find something bad during the procedure?

Early detection provides the best outcome for patients. When found in early stages, colon cancer is potentially curable by surgery or endoscopic removal, in addition to chemotherapy and radiation if indicated.

 

What is your advice to patients who are nervous?

I encourage my patients not to fear colonoscopy. It is a safe and effective way to protect your health. At Vandalia Health, our gastroenterology team is highly trained and committed to creating a positive environment for every patient.

If you are due for screening or have questions, talk with your primary care provider or reach out to our care team. We are here to help every step of the way.

For more information on colon health or how to schedule a colonoscopy screening, visit MonHealth.com/Colon.

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