Focal vs diffuse: Radiculopathy is a pinched nerve in the spine and makes very specific symptoms in a specific dermatomal pattern. Crps affects a broader area such as an entire limb or two limbs, may have some of the same neurological symptoms of a radiculopathy, but also has sympathetic nervous system symptoms of color changes, swelling, and temperature changes. See your doctor if you think you have either.
Answered 7/11/2015
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