The short answer
There is more than one way to screen for colorectal cancer. Options differ in preparation, testing frequency, what they detect, and the follow-up they require. Ask your clinician which are appropriate for your history.
Tests you complete at home
Stool-based tests look for hidden blood or other markers in a sample. They avoid a procedure for the initial test, but need to be repeated at the recommended interval. An abnormal result needs follow-up colonoscopy.
Colonoscopy
A clinician uses a flexible camera to examine the colon. Polyps can be removed during the examination. It requires bowel preparation and a plan for sedation and transportation, as advised by your clinic.
Other visual examinations
CT colonography and flexible sigmoidoscopy are other approaches. Availability and coverage vary. Follow-up colonoscopy may be needed after an abnormal finding.
Choose a plan you can complete
Ask about benefits, possible harms, costs, repeat testing, and follow-up. A convenient first test still needs a clear plan for what happens afterward.
This is general education for U.S. readers, not a diagnosis or a personal screening plan. Talk with your clinician about your own history and symptoms. Follow your clinic’s instructions.