Knowing colon cancer symptoms and understanding your risks may prevent this cancer from happening to you, or help you catch it as early as possible.

Some early stages of colorectal cancer may not show any signs. (Which is why screening is so important).

If you have any signs or symptoms of colorectal cancer, do not ignore them.

You need to tell a doctor.

Rectal and Colon Cancer Symptoms

All average-risk adults age 45 should talk to their doctors about colorectal cancer screening. Adults who have a high risk of CRC should talk to their doctors about getting screened earlier.

Those with a family history of colorectal cancer or any other risk factors should begin screening earlier than age 45 as well.

If you see any signs and symptoms of colon cancer, you may need to be screened sooner. Some people with colorectal cancer don’t experience any of them.

So be sure you’re aware of your body and talk with your doctor at the first sign of anything listed below.

Rectal and Colon Cancer Symptoms

Common symptoms of colorectal cancer may include:

  • An ongoing change in bowel habits (diarrhea, constipation, or feeling that the bowel does not empty completely)
  • Stools that are narrower than usual
  • Blood (either bright red or very dark) in the stool (poop)
  • Rectal bleeding
  • Frequent gas pains, bloating, fullness or abdominal cramps
  • Weight loss for no known reason
  • Feeling very tired (weakness and fatigue)

These can vary based on the person.

The signs will also differ in severity based on the cancer’s location in the colon, size and growth.

Some colon cancer symptoms are mostly noticeable through changes with your digestive tract, but others can impact your entire body.

Check with your doctor if you experience any of the above, regardless of your age, especially if you’re experiencing any of these symptoms.

Here’s stage I survivor Scott Lagasse, Jr.’s story:

No Signs or Symptoms

It’s important to be screened for colorectal cancer, regardless of symptoms.

Regular screening procedures can find polyps and remove them before the cancer can begin to grow, or they can catch early-stage cancer.

If caught early, colorectal cancer is highly treatable and beatable. Some patients who undergo screening have a polyp removed, or cancer discovered, yet had no idea anything was wrong.

It’s not uncommon for individuals diagnosed in the early stages (stage I or II) to not experience any signs of the disease.

Symptoms of early-stage colorectal cancer are not always obvious or visible.

Oftentimes it’s only when colorectal cancer has grown into late-stage cancer or spread that signs appear.


Blood in the Stool

Not all cases of colorectal cancer will include rectal bleeding or blood in the stool; however, it’s a fairly common sign and should alert you that something’s not right.

Tell your doctor.

Rectal bleeding or blood in the stool should never be ignored.

Sometimes a blood test will reveal anemia (a low red blood cell count), which may indicate further screening is needed to discover the cause of your low blood counts.

If you’re experiencing rectal bleeding, you should pay attention to the following factors and talk them through with your doctor:

  • The color of the blood and/or stool
  • Whether the blood is on or in the stool
  • If the blood is on the toilet paper or in the toilet bowl
  • How often the blood occurs
  • If any other symptoms accompany the bleeding

Conditions with Similar Symptoms

It’s pretty common for other conditions to cause some colon cancer symptoms.

An infection, Crohn’s disease, ulcerative colitis and other GI issues can bring similar symptoms.

It’s important to know your body and speak with your doctor to discover the cause of your symptoms and find treatment.

These conditions may also be risk factors for colorectal cancer.

Your doctor can work with you to determine the best treatment plan for your current condition, as well as set up a prevention plan for a future case of cancer.

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