Colorectal cancer: what to watch for and what you can do

Colorectal cancer (often called colon cancer) is one of the cancers you can catch early—and early detection changes everything. Want to know the warning signs, when to get checked, and simple habits that actually lower risk? Read on.

Screening and early detection

Screening catches precancerous polyps before they turn into cancer, or finds cancer at an early stage when treatment works best. For people at average risk, most groups now recommend starting screening at 45. Your options include a colonoscopy every 10 years, yearly stool tests like FIT, or a flexible sigmoidoscopy every 5 years. Each test has pros and cons: colonoscopy checks the whole colon and removes polyps during the same visit, while stool tests are easy at home but need repeats and follow-up if positive.

If you have a family history of colorectal cancer, inflammatory bowel disease (like Crohn’s or ulcerative colitis), or certain genetic syndromes, talk to your doctor about starting earlier and getting more frequent tests. Don’t skip follow-up if a stool test is positive—an abnormal result usually means you need a colonoscopy.

Reduce your risk: practical steps

Avoiding cancer completely isn’t guaranteed, but these steps lower your chances: eat more fiber-rich foods (vegetables, fruits, whole grains), cut back on red and processed meats, stay active most days, and keep a healthy weight. Smoking and heavy alcohol use raise risk, so quitting or cutting down helps. Some people and doctors discuss low-dose aspirin for prevention, but that isn’t right for everyone—ask your clinician before starting it.

Know your body. Warning signs include a change in bowel habits that lasts more than a few weeks, unexplained blood in the stool, persistent abdominal pain, unexplained weight loss, or ongoing tiredness. None of these symptoms prove cancer, but they deserve medical attention.

Treatment depends on stage. Early cancers often get removed with surgery and may not need more therapy. Later stages may use chemotherapy, radiation, targeted drugs, or immunotherapy. Your care team will explain why a certain plan fits your situation and what side effects to expect.

Practical checklist: 1) Check your family history and share it with your doctor. 2) Schedule screening if you’re 45 or older, or sooner if you’re high risk. 3) Eat more fiber, move regularly, and quit smoking. 4) If you notice warning signs, don’t wait—get evaluated.

Having questions is normal. If you need clear next steps, ask your primary care doctor for a screening recommendation or a referral to a gastroenterologist. Early action makes a real difference.