It's hard to tell from the picture what it might be. I'm glad that you're taking him to the vet, though. As for you, either wear gloves when you handle him or wash your hands like crazy after you handle him. Ringworm is not deadly, but it is contagious and it is also uncomfortable. Even if it isn't ringworm, until you do know what it is, it's better to be safe than sorry. Keep us posted.
PS-Welcome to
GPC. If you've got pigg, this is the place to be.