Some patients book a colonoscopy, then keep pushing the date back.
Ask why, and nine times out of ten you’ll hear something similar.
“If they find a polyp, they remove it right there on the spot — that means cutting tissue, doesn’t it?
How can that not hurt?”
Here’s the short answer: colonoscopy polyp removal causes little to no pain in most cases.
The reason is built into the anatomy itself.
This article walks through why colonoscopy polyp removal typically isn’t painful, the main symptoms that call for an Ansan endoscopy, what actually happens during an upper or lower endoscopy, and what to watch for before and after the procedure, in order.
Putting off screening out of fear of pain can carry a far greater risk.
Why Doesn’t Colonoscopy Polyp Removal Hurt?
Short answer: removing a colon polyp typically causes little to no pain on its own.
The colon lining is tissue with almost no nerve fibers that transmit pain signals.
Skin and muscle are dense with pain-sensing nerve endings, but
the mucosal layer inside the colon is structurally different.
That’s why looping a snare around a polyp and cutting it away causes little to no sensation in the moment.
Sedation (sleep endoscopy) is also commonly offered alongside the procedure at endoscopy centers in Korea.
With the patient under light sedation, the exam and the procedure happen together, so any perceived discomfort is reduced further.
✔ The colon lining has almost no pain-sensing nerves, so removal causes little discomfort.
✔ Most procedures are performed under sedation, with reduced consciousness.
✔ What patients notice afterward is usually not pain but bloating from the gas used during the exam.
Putting off screening out of fear of pain is actually the riskier choice.
Early-stage polyps rarely cause symptoms,
so without regular Ansan endoscopy checkups, they can go undetected longer than they should.
What Symptoms Call for an Ansan Endoscopy?
If heartburn, blood in the stool, or unexplained weight loss keeps recurring, it’s worth checking the condition of the lining.
Endoscopy is a diagnostic procedure that uses a flexible, articulated scope to directly examine the lining of the digestive tract.
If upper abdominal pain keeps coming back or heartburn lingers for a long stretch,
it’s worth checking for changes in the esophageal or stomach lining.
In particular, sudden bloating after meals or
unexplained weight loss are signs that call for a closer look.
For the colon, a sudden change in bowel habits, blood in the stool, and persistent lower abdominal pain are the main warning signs.
✅ Chronic heartburn or indigestion that won’t go away
✅ Recurring upper abdominal pain or a sense of fullness
✅ Changes in bowel frequency or visible blood in the stool
✅ A family history of colorectal or stomach cancer
✅ Age 40 or older and eligible for the national cancer screening program
Digestive conditions often show few clear symptoms in the early stages.
That’s why checking the condition of the lining with regular Ansan endoscopy screening matters.
The earlier a condition is found, the easier it generally is to plan the next steps for care.
How Do Upper and Lower Endoscopies Differ?
The two exams differ in purpose and preparation.
An upper endoscopy examines the upper digestive tract, while a colonoscopy examines the lining of the lower digestive tract.
Before the procedure, the care team reviews any underlying conditions and
current medications with the patient.
If you’re taking aspirin or a blood thinner, whether to pause it beforehand should be discussed with your doctor
to help lower the risk of bleeding.
| Category | Upper Endoscopy | Colonoscopy |
|---|---|---|
| Fasting time | At least 8 hours of fasting | Fasting and bowel prep starting about 12 hours prior |
| Duration | About 5–10 minutes | About 15–30 minutes |
| Main purpose | Early diagnosis of gastritis, ulcers, and stomach cancer | Polyp detection with immediate removal, and colitis diagnosis |
If a suspicious lesion turns up during the exam, a tissue biopsy can be taken on the spot, or
in the case of a colon polyp, removal can be performed during the same procedure.
What Should You Watch For Before and After the Procedure?
Following the dietary guidance for the 3 days before the exam and managing your first meal afterward is usually enough for a safe recovery.
Bowel prep before endoscopy is the process of clearing the bowel so that small lesions aren’t missed.
For a colonoscopy, avoid fruit with seeds, sesame seeds, laver, and seaweed starting 3 days before the exam.
If residue is left on the bowel lining, small polyps can be harder to spot.
1. No driving on the day of a sedation endoscopy: sedatives can impair judgment, so plan on public transit or having someone accompany you.
2. Managing your first meal afterward: if you had a biopsy or polyp removed, it’s best to start with a bland rice porridge or gruel about 1–2 hours after the procedure.
3. Review your medications: be sure to discuss blood pressure or diabetes medication with your care team beforehand.
Patients who follow the basic guidelines are generally able to return to daily activities the same day, though individual recovery can vary.
Choosing a facility with proper equipment and a dedicated gastroenterology team can help make the screening more comfortable.
Our clinic also provides digestive endoscopy screening to
help look after the digestive health of the local community.
If you’d like to learn more about the hospital’s departments and screening equipment,
you can find an overview at Burn Treatment, [Ansan Yeorin Surgical Hospital] Home.
Frequently Asked Questions
1. Is there a risk I won’t wake up from sedation, or is it dangerous?
Sedatives used for sleep endoscopy induce a state of conscious sedation, unlike general anesthesia. Oxygen saturation and pulse are monitored in real time during the procedure, which helps it be carried out in a properly managed setting.
2. Does removing a colon polyp hurt a lot?
Because the colon lining has almost no pain-sensing nerve fibers, colonoscopy polyp removal itself causes little to no pain. That said, the gas used during the exam can cause temporary bloating.
3. How often should I get an endoscopy?
As a general guideline, an upper endoscopy is recommended once every 2 years from age 40, and a colonoscopy once every 5 years from age 50. If polyps have previously been found or there’s a family history, the interval may be shortened to every 1–3 years.
4. Can I take my usual medications or antacids on the day of the exam?
Blood pressure medication is often taken with a small amount of water early on the morning of the exam, but diabetes medication or insulin is usually withheld due to the risk of low blood sugar. Be sure to tell your care team about all medications you’re taking beforehand.
5. Does the polyp removal site need any special care afterward?
The removal site generally heals on its own. That said, avoid strenuous exercise and alcohol on the day of the procedure and the following day, and contact your clinic right away if you notice bleeding or severe abdominal pain.
References
· Asan Medical Center, “Polyp of Colon,” Disease Encyclopedia, Asan Medical Center. View
· Colorectal Cancer Screening Guideline Revision Committee, “Colorectal Cancer Screening Guidelines,” National Cancer Center / National Cancer Screening Program, 2015. View
· Gastric Cancer Screening Guideline Revision Committee, “Gastric Cancer Screening Guidelines,” National Cancer Center / National Cancer Screening Program, 2015. View
This article is provided for general health information purposes and is not a substitute for individual diagnosis or treatment. If you have symptoms, please consult a physician.
