13. Nausea or Vomiting
Nausea and vomiting can occur for any number of reasons, including the stomach flu, food allergies, or a side effect of taking certain medications. Certainly our first thought wouldn’t be that it’s due to colon cancer—but it just might be.
When a tumor in the colon—particularly in the area closest to the intestines—causes a bowel obstruction, it can impede or prevent the passing of solids, liquids, and gas. This can lead to symptoms of bloating and constipation, mentioned earlier, but may also cause the affected individual to feel nauseous or even vomit.