Sorry to read of your issues.

I went through the same thing, with my arms, legs, back, and face all cathcing fire as if covered in gasoline and then sparked with a match, which occurred four months after my initial trauma.

But I have found a drug which works for me. I take 300mg of Mexiletine 3x daily, and it does keep my burning under control.

I also take the supplement Acetyl L-Carnitine, 500 mg daily.

Hope this helps.