If you have symptoms of colorectal cancer, your doctor will want to know why. To find out, your doctor is likely to ask you questions about the following things.
Your medical history
Your family history of cancer
Your lifestyle habits, including your diet, whether you smoke, and how active you are
Your doctor may also ask for tests to check for colorectal cancer. Some of these tests are the same ones that are used for screening people who have no symptoms. The doctor could ask for any of these tests.
Digital rectal exam. This is an exam of your rectum. Your doctor inserts a lubricated, gloved finger into your rectum to feel for lumps or abnormal areas.