3. Blood in the stool
A doctor always should investigate blood in your stool.
Hemorrhoids frequently cause rectal bleeding, but because hemorrhoids are so common, they may exist with cancer. Therefore, even when you have hemorrhoids, you should have a doctor examine your entire intestinal tract when you have blood in your bowel movements.
With some individuals, X-ray studies may be enough to clarify a diagnosis.
Colonoscopy is usually recommended. Routine colonoscopy, even without symptoms, is recommended once you are 50 years old.