hot bag

A nice heating pad sometimes can help nerve pain (you can get all-natural ones that heat up in the microwave).

If you are handy with sewing machine or know someone that is you can make your own rice bags.

Use long grain rice,not the instant stuff. Put into a small pouch like bag and double bag and sew it shut.

Throw in micowave for 1-2 minutes and instant hot pack.

I find they stay warmer longer then the bought ones and are way way cheaper!