Signs and symptoms
The symptoms of colon cancer may include:
- Blood in the stools, turning feces a bright or dark red.
- Changes in normal bowel habits, such as diarrhea or constipation, when such changes happen with no apparent reason and last for more than three weeks.
- Unexplained weight loss.
- Abdominal pain.
- Feeling of not having emptied your bowels fully after having a movement.
- Unexplained fatigue.
Sometimes, cancer can cause a blockage (obstruction) in the intestine, provoking constipation and bloating, vomiting, and abdominal pain.