At What Age Should You Start Colon Cancer Screening?
Medically reviewed by Dr. E. Vimalakar Reddy, Surgical Gastroenterologist, Apollo Hospitals, Jubilee Hills, Hyderabad | Last reviewed: 24 June 2026
Quick answer: Most guidelines now recommend starting colorectal cancer screening at age 45 for people at average risk. If you have a family history of colon cancer or polyps, a genetic syndrome, or inflammatory bowel disease, you may need to start earlier — and anyone with warning symptoms should be checked at any age.
Screening by risk level
- Average risk: begin at age 45 and continue through about age 75.
- Family history of colon cancer/polyps: often begin 10 years before the age your relative was diagnosed, or by 40 — ask your doctor.
- Inflammatory bowel disease (long-standing): earlier and more frequent screening.
- Symptoms at any age: bleeding, change in bowel habits or weight loss should be evaluated immediately, regardless of age.
Why screening matters
Colorectal cancer usually develops slowly from polyps that may cause no symptoms. Screening can find and remove polyps before they turn into cancer, or detect cancer early when it is most treatable. That is why screening at the right age is one of the most effective tools in cancer prevention.
Related reading
Sources: WHO; ICMR / National Cancer Registry Programme; US Preventive Services Task Force screening guidance. Disclaimer: For general awareness only; not a substitute for professional medical advice. Consult a qualified doctor about screening that is right for you.