Colon Cancer Warning Signs You Should Not Ignore

One of the reasons colorectal cancer is so dangerous is that it frequently causes no symptoms early on. That is precisely why screening — which can catch it before symptoms ever appear — is so important. But when symptoms do occur, recognizing them and acting promptly can make a meaningful difference.

The following warning signs warrant a conversation with a physician, regardless of your age or when your last screening was.

Rectal bleeding or blood in the stool

Blood in the stool — whether bright red or dark and tarry — is one of the most important symptoms to have evaluated. While it is often caused by something benign, such as hemorrhoids, it can also be a sign of colorectal cancer, and it should never be assumed to be harmless without an evaluation.

A persistent change in bowel habits

Occasional changes in your bowel patterns are normal. What warrants attention is a persistent change lasting more than a few weeks — ongoing diarrhea, constipation, or a noticeable change in the caliber of your stool, such as stools becoming consistently narrow.

Unexplained weight loss

Losing a significant amount of weight without trying, especially when combined with other digestive symptoms, is a red flag worth discussing with your physician.

Persistent abdominal discomfort

Ongoing cramps, gas, bloating, or abdominal pain that does not resolve can have many causes, but when persistent, it deserves evaluation — particularly alongside any of the other symptoms here.

Fatigue and unexplained anemia

Colorectal cancer can cause slow, sometimes invisible blood loss over time, which can lead to iron-deficiency anemia. Persistent fatigue or a new diagnosis of anemia without an obvious cause is sometimes the first clue, and it should prompt further evaluation.

A feeling that the bowel does not empty

A persistent sensation that you need to have a bowel movement that does not go away after having one can be a symptom worth mentioning to your physician.

When to see a gastroenterologist

Any of these symptoms — and especially a combination of them — is a reason to schedule an evaluation. It is important to emphasize that most of these symptoms are caused by conditions far less serious than cancer. But the only way to know is to be evaluated, and early evaluation is always better than waiting.

Do not let embarrassment or fear delay a conversation. Gastroenterologists discuss these symptoms every day, and an evaluation is straightforward.