AktoMan has a colorful solution:

I’d thought of this technique before, but tried it for real at the weekend, and it seemed to work. Instead of contorting yourself trying to angle a mirror to those difficult to reach places trying to see if it is a mole or a tick or your imagination playing tricks, use your digital camera. Just take a steady picture of the area. You’ll probably need the macro switched on. That way you can also zoom in to see more details. Not much help when you have to remove any ticks found though; oh, and delete the photos to free space on you card and for sake of public decency too.

Hmm, I think this gives new meaning to flash photography.