OP: I have advanced OA in both feet and ankle (right leg mostly) , right side of body is messed up with issues due to OA. I find that when I think of it, I massage my right foot for sure with DMSO and one can buy it already somewhat diluted or can work on it themselves. I also add some essential oils to my DMSO and it's good for the burning in my leg and foot. Frankensense is great and I add it to the DMSO too.

If you are unfamiliar with DMSO, there is a lot of info online and even a yahoo group dedicated to DMSO. Rubbing my foot and ankle helps too with circulation issues there.