Suggest Treatment For Pain And Numbness In Both Hands And Fingers

hi, i have been using meth intravenously for the last couple months, and of recent i have expirienced extrame pain and numbing in both hands and fingers. I wake up in the middle of the night with shooting pain, and have to get up and shake them out before the pain will subside...I;ve heard this to be severe carpal tunnel syndrome, and that vitamin b6 is a good treatment in younger patients. Is this true and is there anything else I should be trying? I have missed a few times and had minor abseths which I had drained, as well as hit arteries a couple times....for work however i do construction, anything from demo, framing, finish work, remod s etc....could it not be the meth at all? Thanks