Colonoscopy: preparation, procedure and recovery
Bowel preparation is an important part of the examination. Learn about individual instructions, the procedure day, results and signs needing prompt care.
Why is colonoscopy performed?
A flexible camera examines the inside of the large bowel. It can investigate bleeding, changes in bowel habits or other symptoms, and can be used for cancer screening in appropriate people. Screening timing and method depend on age, family history and individual risks.
Your preparation checklist
- Follow the procedure team’s written plan for bowel-cleansing medicine, food, fluids and timing.
- Report diabetes, kidney or heart disease, blood thinners and all other medicines in advance; do not change doses yourself.
- Contact the team if you cannot finish preparation. Do not try extra doses or another product; incomplete cleansing may mean repeating the examination.
- If sedation will be used, arrange someone to take you home; do not drive afterwards.
What may happen during the procedure?
The camera is passed through the anus to inspect the bowel lining. A polyp, a tissue growth, may be removed or a biopsy taken if needed. Comfort and pain-relief options are discussed with you. Duration varies with preparation and any additional procedures.
Results and going home
Observation may be needed for a time, and bloating or cramps can occur. Get instructions on food, medicines and returning to activities. Biopsy or polyp analysis takes additional time; arrange a results discussion and any further follow-up. Rely on the procedure team’s estimate, not this page, for result timing.
Which symptoms after the test are urgent?
Risks include bleeding, a tear in the bowel wall and reactions to sedation. Severe abdominal pain, fever, ongoing or increasing bleeding, dizziness or marked weakness require immediate medical help. Call 112 for fainting or breathing difficulty; do not wait for follow-up.
Information sources
These sources support general information; they do not confirm our hospital’s services or clinical approval.
This information is general and does not replace individual diagnosis or treatment advice. Discuss your own situation with your healthcare team.
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