Colonoscopy: bowel preparation and follow-up
Colonoscopy directly examines the entire colon from the rectum to the cecum and is used to detect and help prevent colorectal cancer, polyps and inflammatory bowel disease.
Key points
- Diagnosis and polyp treatment
- Bowel preparation and dietary instructions
- Results, activity limits and warning symptoms
Purpose of colonoscopy
Colonoscopy can diagnose colorectal cancer, polyps, ulcers, bleeding and inflammatory bowel diseases such as Crohn's disease and ulcerative colitis. It also helps identify the cause of persistent diarrhea, constipation or blood in the stool. Polyps found during the examination may be removed to help prevent colorectal cancer.
Recommended age and interval
Adults aged 50 or older are advised to have regular examinations every five years even without suspicious symptoms. An interval of two to three years may be advised for people with a family history of colorectal disease or a previous polyp. People planning long-term residence, study or travel overseas are advised to complete the examination at least two weeks before departure.
The appropriate interval can vary with health, family history and earlier examination and pathology results, so confirm it with your clinician.
When may colonoscopy be needed?
Discuss testing for blood or black stool, a feeling of incomplete evacuation, persistent abdominal pain, diarrhea or constipation, long-lasting bloating or digestive discomfort, unexplained weight loss or anemia.
Regular screening or closer follow-up may also be needed from age 50, after a positive fecal occult blood test, with a family history of colorectal cancer or polyps, or after previous polyp removal.
Preparation and precautions
Seoul W Clinic prescribes both liquid and tablet bowel preparations. From two to three days beforehand, avoid high-fiber foods that can remain in the bowel, such as seeded fruit, kimchi and multigrain rice. Breakfast and medicines are generally withheld on the morning of the examination; discuss anticoagulants, blood-pressure medicines and other regular medicines in advance.
Take the bowel preparation from the previous evening according to the clinic's instructions and follow the dietary limits and exact timing. If you cannot take it or could not follow the instructions, do not take an extra dose on your own; contact the clinic first.
After the examination
Air introduced during the examination may cause bloating or discomfort. Passing gas, gentle walking or warming the abdomen may help. Once bowel function has recovered, start with a small amount of soft food such as rice porridge.
After polyp removal, avoid heavy lifting, strenuous exercise such as hiking or golf, saunas, long-distance flights and alcohol for about one to two weeks to reduce the risk of delayed bleeding. Restart any anticoagulant withheld for the examination only as directed by your treating clinician.
Contact the clinic immediately or attend the nearest emergency department for severe abdominal pain, high fever, dizziness, a large amount of bloody stool of about half a paper cup or more, or black stool.
What to confirm afterward
Confirm the visual findings and whether tissue sampling or polyp removal was performed. Review home instructions and the plan for final-result consultation. Allow for registration, consultation and recovery time as well as the procedure itself.
Frequently asked questions
Can I have upper GI endoscopy on the same day?
Yes, the examinations can be performed together. Confirm eligibility and preparation at booking because the plan depends on your health and appointment availability.
What if bowel preparation seems incomplete?
Do not change the dose or examination schedule yourself. Tell the clinic what you have taken and describe your bowel movements, then follow the clinical team's instructions.
Can I schedule other activities immediately afterward?
Recovery and result consultation can take additional time. Home activity instructions depend on sedation and any treatment such as polyp removal, so review them before planning the rest of the day.