Colon Cancer - Signs & Symptoms

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Signs and symptoms of colon cancer include:

• A persistent change in your bowel habits, including diarrhea or constipation or a change in the consistency of your stool

• Rectal bleeding or blood in your stool

• Persistent abdominal discomfort, such as cramps, gas or pain

• A feeling that your bowel doesn't empty completely

• Weakness or fatigue

• Unexplained weight loss

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Colon cancer - Symptoms and causes - Mayo Clinic