Hi have you tried anything like a moist rice blanket that you can put in the microwave for one minute, The mosit heat is like a warm bath that in barely warm but it has helped me some with my arm and shoulder. They have these in pillows, blankets, etc. But if you want to try it before you buy it. Get a mens sock and fill it half way with rice then tie it in a knot. Then put it in the microwave a 1 minute. See if that is to hot and if so try 45 seconds. Hope it helps. Gentle hugs.

Annick