These are one of the funniest kind of jokes because the Medical profession is otherwise a serious profession.
A patient was waiting nervously in the examination room of a famous specialist.

"So who did you see before coming to me?" asked the doctor.
"My local General Practitioner."
"Your GP?" scoffed the doctor. "What a waste of time. Tell me, what
sort of useless advice did he give you?"
"He told me to come and see you."