A friend of mine, 48 yr old male, alcoholic, meth user. After almost 6 yrs fully clean and sober, he has relapsed. Currently doing his best to get back on track, his left hand is numb. He does not tell me everything, but what he s told me this time, is he did a shot of meth about a week ago,(right arm) blew a vein and his left hand is now numb. I have never used meth this way, although I have used, it has been 8 years, so I am not familiar with this. Could the blown vein have to do with his numb hand?