Colon Cancer Symptoms

In the early stages, colon cancer usually doesn't have symptoms. As the disease progresses, which can take years, symptoms include:

• blood in stool
  
• persistent constipation, diarrhea, or other bowel changes
  
• thinner stools
  
• unexplained weight loss
  
• abdominal pain and discomfort- generally feeling full, bloated, or cramping
  
• abdominal tenderness or pain
  
• fatigue
  

These colon cancer symptoms are not unique and can also be symptoms of many other conditions.

source : cancer.about.com