Welcome to NeuroTalk.

People who lose lots of weight may become very low in essential fatty acids. This was at one time called "slimmer's paralysis".
These fats, make up the cell walls of all our cells and especially the nerves and the fatty sheaths of the axons.

Fish oil, flax oil and evening primrose may help you repair things.

I'd do 2 fish oil, one flax, and one evening primrose, with food daily. You can break them up any way you want to take at meals.

Next is a good B-complex like B-right by Jarrow. The B's are helpful for the metabolism of the good EFAs.

And next is magnesium. This is also a cofactor in the metabolism of the EFAs. You can do the new lotion for your legs and feet if you want (Morton Epsom Lotion)... at WalMart or online at Amazon. Orally SlowMag or one of the chelates (but not oxide).

I have a magnesium thread here:
http://neurotalk.psychcentral.com/thread1138.html

B12 is in the B-Right, but taking separately may help faster.
Methylcobalamin 5mg on an empty stomach...daily.

You should see improvements within 3 months. It takes time to repair.

Vibrating tools are really bad for nerves, especially those with problems.