You should have a colon and a rectal exam every 3 to 5 years starting at age 50.
The tests for colon and rectal cancer include several components.
A Fecal Occult Blood Test is done each year to test for blood in the stool which can signal colon cancer.
Other components, such as the colonoscopy, can be done every 5 or 10 years depending on your family history and risk factors for cancer.