That could be a neurological thing (perhaps related to migraine), and it could also be a physical problem (poor circulation, water retention, ect). I'd suggest having a physical, and getting your peripheral artery health checked out, and get checked for heart health (to be sure you're not retaining water due to a congestive heart failure issue). Those things can come on slowly and at younger ages than some people know, and if caught early, are totally fixable.
It could even be a nutrition problem. Only a good doctor will be able to give some good advice on that...
Charles