symptoms colon cancer
Signs and symptoms of colon cancer include: 1  A change in your bowel habits, including diarrhea or constipation or a change in the consistency of your stool, that lasts longer than four weeks. 2  Rectal bleeding or blood in your stool.  Persistent abdominal discomfort, such as cramps, gas or pain.
If you notice any symptoms of colon cancer, such as blood in your stool or a persistent change in bowel habits, make an appointment with your doctor. Talk to your doctor about when you should begin screening for colon cancer. Guidelines generally recommend that colon cancer screenings begin at age 50.