Idiopathic Peripheral Sensory Neuropathy / Numbness / MS

[Steve-Martin]

  I have been diagnosed with Idiopathic Peripheral Sensory Neuropathy.
  I have partial numbness on my left side.  There are certain areas
  on the left side that are more numb - those being my left face/cheek
  and left thigh (very similar to meragia paresthetica); I have partial
  numbness in both hands especially in the last two fingers continuing
  to my elbows.  This gets worse at night.  At times, I have partial
  numbness in my feet.  There is a burning sensation in both thighs along
  with periodic shocks.  This varies slightly in intensity daily.
  Lab and other tests have ruled out blood flow problems.  Standard
  lab test all come back normal.
  I have had an MRI of the brain to see if lesions exist.  It came back
  negative.  This was an attempt to rule out MS.
  The numbness varies in intensity.  I sense partial numbness from my
  hips downward.  I now notice decreased sensitivity in the gentials
  but have no erection problems.
  I would appreciate any thoughts you may have.

[CCF neurology MD MM]

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There are many aspects to this question which can be commented on, do you
have specific questions ?
Entire books have been written on the topic so without some guidance from
you I may waste your time on aspects which not of interest to you.
A couple of important points.... The term idiopathic means that an
underlying cause has not been identified, this means that a thourough
search should have been performed to exclude the known causes , some of
which may be treatable.
Symptoms, regardless of the cause may be helped by the drug Neurontin
which is useful to treat either pain or unpleasant sensory
abnormalities like severe tingling.
I have had considerable sucess in one case using this drug for the
shock-like sensations you describe.