Neuropathy is a general term that refers to any problem with the nerves. Any part of the nerve can be affected, but damage to the axon is most common. The axon sends signals or messages from one nerve cell to the next.
There are many possible reasons for neuropathy. Poor nutrition combined with chronic alcohol use, diabetes, or lead poisoning can cause neuropathies. Many people suffer from neuropathies without ever knowing the cause.
Complaints of symptoms of the last two fingers suggest involvement of the ulnar nerve. Once the location of the neuropathy is established, then the cause can be determined. Pressure on the nerve coming anywhere from the neck down to the wrist can cause this kind of clinical problem.