I had the same worry yesterday and again today so can definitely relate. I have RSD in the entire left side of my body and yesterday I started feeling my right foot cramp up and burning pain in my right calf and knee.

A few things to consider that my fiancee came up with - I did try to cut down on my morphine starting the day before yesterday - this can be a side effect of that.

Also, I noted the date of your post and if you're anywhere in the North East, we were getting a strong storm system moving in. The change in air pressure could cause it.

However, I would definitely talk to your DR about it, especially if it persists.

Dawn