Nerve pain is caused when the sheath that is the exterior covering around the nerve disintagrates and leaves the nerve open and bare in the body. Many times the lack of vitamin B-12 causes the sheath disolves and leaves the nerve raw. In this case you will have to give yourself vitamin B-12 shots in order to cause the sheath to repair itself. Pill won't work becasue, they are not strong enough and don't stay in the body log enough to do what is needed to regrow the sheath.