The short answer
For adults at average risk in the U.S., colorectal screening generally begins at 45. The USPSTF recommends screening through age 75. From 76 to 85, the decision is individual and takes account of overall health, previous screening, and preferences.
Your history changes the conversation
Tell your clinician about relatives with colorectal cancer or polyps, previous polyps, inflammatory bowel disease, and known inherited conditions such as Lynch syndrome. You may need a different starting age or schedule.
Symptoms are a separate conversation
Screening is testing before symptoms appear. If you notice blood in your stool, a persistent change in bowel habits, or unexplained weight loss, contact a healthcare professional rather than waiting for routine screening eligibility. These symptoms can have different causes and need evaluation.
Bring these questions
- Does my family or medical history change when I should start?
- Which test makes sense for me, and when would I repeat it?
- What happens if the result is abnormal?
- How do I confirm coverage and arrange the appointment?
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.