The Rice Sock! This might seem like an obvious home remedy, but I just made one and I don't know why I haven't done it sooner!!! From the microwave, it works great as a heat pack. Straight from the freezer, its a icy pack. Make two so you can do contrast therapy I got the specifics on how to make one from the WikiHow website here http://www.wikihow.com/Make-a-Rice-Sock
I suggest going thru the entire page, there are some valuable Suggestions and important Warnings. I've been putting a glass of water in the microwave with the rice sock when heating it to prevent fires and add a bit of moisture to the heating process. My screaming tendonitis pain is now more of a chattering pain with the help from my socks. Ask someone to make you one or two today!! It really takes zero skill and time

added tip: socks w/o a bended heel works great!