I have been having progressively extreme leg/arm numbness, lack of circulation, almost impossible to lie down, legs burn and go to sleep. Difficulty with joints (and pain), muscles "lock up" with the slightest movement. Dizziness and weakness upon walking. Had diabetes test, MRI of lower back, blood tests, heart tests, neurology test of legs. Results a little high on diabetes and neuropathy, but not extraordinary enough to diagnose as a problem.