What can I use to draw a thistle out of my foot?

At least I think that's what it is, sure feels like it. I've had it since last weekend when I had to untangle my Beagle from around a bush in tjr middle of the night. I know there's thistles and pine needles out there. But i can't get a hold of it with anything, and its starting to be bothersome. Is there anything I can use to help draw it to the surface so i don't have to keep digging and poking at it? Thanks in advance!