Nerve function may recover spontaneously as time goes by. It may take 4-12 weeks. However,
after 6 months of
injury, if there is no improvement, condition may become permanent. At this moment, systemic administration of corticosteroid, amitryptline, gabapentin, nutritional supplements, such as ,Vitamin B1, B6, B12, folic acid, omega3 fatty acid, may help early resume normal function.