Hi,
It is difficult to treat such a persistent post herpetic
neuralgia. If you have tried
gamma ray
knife surgery as well, then there is nothing much in the way of a treatment that can be done. You might have of course tried topical creams, antidepressants, anticonvulsants, steroids, local anesthetics, probably electrical nerve stimulation. If your doctor has not prescribed any of these, you may ask for them. There have been some cases where some amount relief is offered by meditation.