Hmmm sounds like neuropathy. Does she have diabetes? You can also get neuropathy from other things, such as nerve damage. My dad has neuropathy in his foot, on the side where they took veins from his leg for a heart bypass when he got a valve replacement. At this time, there doesn’t seem to be much to treat it. The only thing that helps him is to keep his mind busy, during the daytime, so he putters in the garage and makes or fixes things. At night, he often has to get up and walk around to relieve it somewhat.