It may be his OPINION that you have a hereditary neuropathy.
Some doctors will give this diagnosis, but you won't know for sure unless you choose to have the DNA testing for Charcot Marie Tooth. CMT has significant effects however, in the feet and legs.

There are many causes of PN (over 100). And there are doctors unwillingly to find them for you. It is arrogance or ignorance on their part.
(or if your insurance type is limited in scope, cost may be a factor)

Here is a link to Quest diagnostics here in the US, that reflects Dr. Latov's (in NYC) testing protocols:
http://www.questdiagnostics.com/test...ripheralNeurop

If this is only in your hands and not affecting your feet yet, that suggests perhaps some carpal tunnel, or orthopedic neck issues.
Hypothyroidism may affect the hands this way ...it did for me.
So getting the thyroid evaluated well, may reveal something.

If your B12 is very low, this too will affect the nerves and spinal cord. So you should check that you are not below 400pg/ml in that test result.

Have you tried wearing the carpal tunnel wrist braces at night to protect your hands from compression during sleep? I'd do that ...you can do that yourself without a doctor.