Colorectal Cancer: Symptoms

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Common symptoms of colorectal cancer can include:

  • Constant tiredness or fatigue
  • Feeling very tired all the time
  • Having nausea or vomiting
  • Losing weight with no known reason
  • Unexplained iron-deficiency anemia (low number of red blood cells)
  • A change in bowel habits
  • Diarrhea, constipation or feeling that the bowel does not empty completely
  • Stools that look narrower or thinner than normal
  • Bright red or very dark blood in the stool
  • Discomfort in the abdomen, including frequent gas pains, bloating, fullness and cramps

However, it is important to note that these may also be symptoms of less severe, more common conditions.