Nausea and/or Vomiting
When nausea and vomiting are symptoms of colon cancer, it’s usually because a tumor is causing a bowel obstruction, usually in the proximal colon (meaning the end closer to the small intestines). Nausea and vomiting may occur at any stage of colon cancer but are more common with advanced disease.
It’s important to remember that the occurrence of nausea and vomiting alone, without other colon cancer symptoms, is unlikely an indication of cancer. There are lots of reasons for feeling sick and throwing up. That being said, if nausea and vomiting are accompanied by other worrisome signs such as constipation, abdominal cramping, and/or abdominal distension, colon cancer could be a cause.