I know a guy in his '70s who's had numbness in his feet for some time -- he isn't on medication, that's just the way it's been. He's pretty active, too, builds houses for Habitat. Doctor hasn't been able to figure it out; in the latest stab, the doc gave him a fancy new blood test which shows a potassium deficiency which might -- MIGHT -- be the cause, and put him on potassium supplements, which are cheap. I'll post back if he shows any improvement.
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