Not sure if everyone has seen these or not, but my mom got one before she had her neck surgery, and it has practically been an extra appendage of mine since I had my surgery. I developed occipital neuritis post decompression and I swear my muscles never want to loosen up at all, plus the muscles and nerves just make each other mad.
Anyways, it's magnetic, so it stays where it should. And mine has been on for almost a year straight and it's still going strong haha
http://www.amazon.com/Sunbeam-885-000-Renue-Therapy-Shoulder/dp/B001JCXJTW/ref=sr_1_3?ie=UTF8&qid=1366842016&sr=8-3&keywords=heating+neck