What does rectal bleeding mean?

Depends. If you are having persistent bleeding from your rectum, you need to get it checked. While hemorrhoids are a common cause of rectal bleeding, your physician may decide to pursue other diagnoses. Getting a full history and physical exam will guide the decision. Are you having symptoms like dizziness or passing out? Is the blood bright red or dark? These are questions that need to be answered.
Need exam. Could be hemorrhoids, fissure, inflammatory bowel disease, polyps (juvenile type). Hard to tell w/o exam. Get checked.
See doctor. Rectal bleeding is not normal and should always be evaluated. See a colorectal surgeon, who will do a complete evaluatin and examination, and can treat most causes of rectal bleeding.