I have had patello femoral syndrome for about 9 months now. Severity varies but always bothers me at least a little. I did some therapy and am continuing to do the exercises on my own now. My problem is I am now having frequent cramps behind my knee. I have googled and can't find anything. I've never had an issue with muscle cramps before and this seems odd to me because they are always right behind my knee. I do several leg streches daily. What can I do? My husband always asks about water and electrolytes but I feel it is not that and completely related instead to patello femoral syndrome.