Anyone ever have this happen with a skin doctor?

You get a rash or some kind of skin outbreak. It's itchy and/or painful. All your friends notice it and urge you to see a doctor. Total strangers notice it and comment.

So, finally, after trying every home remedy you can think of, you go to a skin doctor, a specialist.

The doctor asks a few questions about it, then takes a look.

The doctor looks at it and says:
"I can't see anything."