It's a permanent injury sustained in 2001, as a result of my head being jolted after it's previously been brain-injured. Weed for Chronic Pain. I already have to live my life after having a TBI, but I had no pain, but the second jolt caused pain, which still exists four and a half years later (8-1-01). I'm not sure what the results were of the Neurologist's tests, but he offered me Neurontin, and after that, he said there was nothing he could do. The next doctor tried two similar epileptic drugs, at different times, when they were over, he started me off on a muscle relaxer (baclofen) to which he added an epileptic drug (topamax).
This was after a year of waiting for the injury to heal on it's own.