A quick search on the Internet for “neck wrap” will turn up hundreds of options, including different styles and different materials, some including aromatherapy options and also often providing information on moist heat wraps for other areas of the body. I’ve pasted in a few options below, just to give you an idea of the different products available.
Bed Buddy Moist Heat ($12.49)
Tension Relief Wrap ($19.95)
Lumbar Wrap ($29.95)
Medi-Beads Neck Wrap ($25.00)
Warming Aromatherapy Neck Wrap ($19.98)
A lot of low back pain is connected to tight spots in the glutes—check for tender areas in your glutes and sit with a tennis ball pressed between each such area and the surface of a hard chair or the floor.
You might also consider buying a foam roller, a “stick” (http://thestick.com/), or a tp massage ball (http://www.tptherapy.com/groin.php?id=70), which will aid you in stretching and releasing tight muscles not only in your glutes but your legs as well.
And don’t forget about Epsom salts (available at most grocery and drug stores) and Biofreeze (available from The Knot Whisperer)!