I'll second frogga's heating pad suggestion - I was trying all kinds of things, and my doctor suggested muscle relaxers, because I was getting spasms that were starting to look like compartment syndrome - obviously not positive.
If you can - even sometimes - I've found that implementing a stretching regimen helps. I've got ridiculous ankle and knee ligament contractures, so I worked with a PT to develop a slowly increasing stretching regime. However, even to do that, I usually have to apply heat first.
A heating pad is great, and Thermacare is now making heated wraps for most parts of the body - you can even wear them under your clothes so if you're bothered during the day, no problem!
With any kind of heat, though, I've found that I have to be careful of burns - if you've got decreased nerve function at all, you might not notice! I know that may sound obvious, but I didn't think about it until I took my heating pad off one night and found heat rash!
Good luck!