Most people are diagnosed after going to see their GP about symptoms. If your GP suspects you may have cancer, you should be seen at the hospital within 14 days.
Some people are diagnosed after taking a test as part of the NHS Bowel Screening Programme. Bowel screening is a way of finding bowel cancer at an early stage before it causes symptoms.
Sometimes, people are diagnosed with bowel cancer after being admitted to hospital with a problem, such as bowel obstruction.