Sounds like a nerve thing my mother had once. Her's ended up going away over time and with meds. A Dr. visit is definately in order. If I can catch up with her I'll ask and let you know. It's not a real uncommon thing if it's what you have but dammit, I just can't remember!!
Possibly shingles? Here's a like to Web MD where you can go through symptoms. Most end up saying the obvious - see a Dr.!!
http://www.webmd.com/hw/health_guide...navbar=hw92247