Paraplegia

I have an acquaintance who had a snowboarding accident many years ago and had a spinal cord injury and has been paraplegic and in a WC for 20 years. He says his legs hurt constantly—they feel like they are on fire—which I believe is pretty common with such a condition. Is anyone familiar with any TMS research on pain with paraplegia. I think there is some non-conclusive research on phantom limb pain, which is the closest thing I can think of. But one can only imagine the rage this young, athletic recently married man has felt since the day of his accident 20 years ago, assuming rage is a factor in TMS. Thanks!