My son has inherited neuropathy from me and is an accomplished pianist. he is 28. Recently he told me that he is having trouble playing the piano. Our disorder, axonal CMT, definitely causes muscle loss, weakness, and the tingling that you describe. In our case it is irreversible and progressive.

Another son, who does not have CMT, was injured in a car accident with the symptoms of tingling and numbness in the last two fingers on his right hand. It was completely corrected by surgery, and he is fine now.

I do not see how fish oil could help with this symptom, and pain killers are not always effective with nerve pain. You really need to find out what is causing the symptoms, because as the two examples above show, there are very different outcomes based on the cause.

If it is just one hand, rather than both, I would take that as a hopeful sign that something mechanical and therefore fixable is going on.