A surgeon is a kind of doctor who treats his patients by using his hands, often by performing surgery. If you're comfortable slicing into a person's body to remove an appendix, then you might make a decent surgeon.
The word surgeon comes from the Greek kheirourgos, which is a fancy way of saying "done by the hand." Whereas a doctor-at-large might treat his patients by chatting with them, asking questions, and prescribing medications, a surgeon's work is much more hands-on, you might say. A surgeon specializes in cutting open the body, usually to heal his patients.
