Colorectal Cancer Symptoms

In their earliest stages, colon and rectal cancers typically don’t cause symptoms. When symptoms do appear, they may seem to be nothing to worry about.

Screening tests can detect, and sometimes even remove, developing cancers long before they become noticeable. It’s important to follow the recommended screening guidelines for your age and risk factors.

What are the symptoms of colorectal cancer?

The main symptoms of colorectal cancer are listed below. If you notice any of these symptoms, you should make an appointment with a doctor. The doctor will determine if more testing is needed. 

Please keep in mind that experiencing one or more of these symptoms does not necessarily mean that you have colorectal cancer. Many patients who go to their doctor for worrisome bowel or digestive problems turn out to be struggling with benign conditions, such as hemorrhoids or irritable bowel syndrome.

  • Blood (either bright red or very dark) in bowel movements
  • Dark green stools
  • Changes in bowel habits, such as frequent diarrhea or constipation
  • Frequent gas pains, swelling or cramps
  • Loss of appetite
  • Stools that are narrower than usual
  • Losing weight without trying
  • Feeling very tired
  • Vomiting
  • Anemia