Back and neck pain are no joke. Not only are they uncomfortable but they can result in lasting damage. So, the next time you find yourself in need of a heating pad but don't have one on hand, try using this simple hack. All you need really is some rice (uncooked) and a sock. Just fill the sock with rice and throw it in the microwave for around three minutes.
It should come out moderately warm. If it's too hot to the touch, wait a little while and then use it to ease whatever pain you might have. This should save you a trip to the store and ease the pain.