the nerve sheaths are damaged by toxins eating away at them. could be anything, even just daily build up to your environment....home or work. sometimes our work or homes have especially high toxins or we take medicines that do it, but i personally think all of us have some degree of damage already done living in today's world so i would think it would be a good thing for everyone to detox with something with high chlorophyll or msm (organic sulfur) in it and then get going taking either a supplement w/ gla (400-500mgs daily) or the hempseed pro pwr or both. this way you hit it with both guns blazing........get rid of toxins that caused the problem and rebuild back to healthy nerves.
let me know by pm or here if you have any other questions or comments. i just love the open minds here .....we are all learning from each other after all
bunches of love and light,