trigeminal neuralgia
"I had an Acoustic Neuroma removed in August 2015. I have had terrible headaches and face pain for over a year. I switched neurologist and he stated that I just didn't present symptoms of Occipital Neuralgia also of Trigeminal Neuralgia. I have been on Gabapentin and doxepin  with very little relief of the zaps and shocks that lead to like a muscle cramp across the back of my head that lead to a migraine like headaches. I have taken this for a week and this has helped immensely. I have cut in half the headaches and other pains. So far I'm happy with this."