Have you tried ice or the cool gel packs ? I know they can cause more problems for those who also have RSD (maybe what caused my RSD ?) but I could not live without ice packs.

I can't sleep on my back............embarrassed to say, but I'm a snorer. I sleep on my non affected side with pillows to support my affected arm from leaning forward. I have a good memory foam pillow that is higher than some of the cheaper models that I have seen. It cradles my head/neck just perfect sleeping on my side, but I don't find it comfortable if I lay on my back (to read)