Brain, nerve, blood: Sensation is such a complicated process that there are many possible reasons. Static numbness may represent a process such as stroke, ms, or polyneuropathy, while variable numbness can be due to compression/inflammation of the spine, spinal roots, nerves in the arm, or compromise of the blood flow to any of these regions. Your pcp and/or a neurologist can help with the search!
Answered 11/29/2014
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