I would like to recommend you to try neurofeedback and neuro-hypnotherapy methods.

CASE STUDY OF TRIGEMINAL NEURALGIA USING NEUROFEEDBACK AND PERIPHERAL BIOFEEDBACK
http://www.eegspectrum.com/applications/ch...minalneuralgia/

Hypnotherapy is a useful adjunctive psychotherapeutic procedure used in various conditions such as pain disorders, atopic dermatitis, and alopecia areata. However, it is less utilized in the field of dermatology. Only limited data exist on its role in the management of various skin diseases. There is dearth of literature on the role of hypnotherapy in Hansen's disease (HD). We report two cases of HD, one with very resistant neuralgia and the other with recurrent erythema nodosum leprosum (ENL). Both the patients were assessed using hospital anxiety and depression scale, dermatology life quality index and the neuralgia was assessed using the visual analog scale. Three sessions of hypnotherapy were given to both the patients. There was dramatic improvement in the incidence of ENL and neuralgia and we could rapidly reduce the dose of drugs used for both conditions.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3969677/