Colon Cancer Signs

Colon cancer signs generally do not appear in the early stages of the disease. Screening for colon cancer can detect the disease before symptoms are present, making it easier to treat. As the disease spreads, colon cancer signs may appear, including diarrhea, constipation, a change in the frequency of bowel movements, unexplained weight loss, and vomiting.

 

Are There Early Colon Cancer Signs?

As with most cancers in their early, most treatable stages, there are usually no early colon cancer signs. That is why it is so important to have regular screening tests to check for colon cancer, even when you might not notice anything wrong.
 

A List of Colon Cancer Signs

As the disease progresses, colon cancer signs may appear. Common colon cancer signs include:
 
  • Diarrhea, constipation, or feeling that the bowel does not empty completely
  • A change in the frequency of bowel movements
  • Either bright red or very dark blood in the stool
  • Unusually narrow stools
  • General abdominal discomfort, such as frequent gas pains, bloating, fullness, and/or cramps
  • Weight loss for no apparent reason
  • Constant tiredness
  • Vomiting.
     
These symptoms may be signs of colon cancer, but they can also be caused by other conditions. It's important to check with a doctor if you have any of these possible colon cancer signs so a proper diagnosis can be made. Don't hesitate to see a doctor -- even if you aren't feeling any pain. Early colon cancer usually doesn't cause pain, so you should still seek medical attention if you experience possible colon cancer signs.
 

Diagnosing the Disease Before Colon Cancer Signs Develop

Because most people don't have any colon cancer signs in the early stages of this disease, screening is important. Screening allows the doctor to find polyps or colon cancer early. Also, colon cancer is highly curable if diagnosed and treated early.
 
(Click Colon Cancer Screening for more information about detecting the disease before colon cancer signs appear.)
 
Written by/reviewed by: Arthur Schoenstadt, MD
Last reviewed by: Arthur Schoenstadt, MD