hi, I was severely electrocuted(24,000v) some 4yrs ago and had 2nd and 3rd degree burns to my hands and lower l.arm, the voltage arched out my r.elbow. Initially i regained 95% motion in my hands but, in the last 6mths two fingers and thumb, and lesser my wrist, have increasingly become stiff and painful. I now cant hold a pen and write for over a minute or two. there is no obvious onset of arthritis. what may it be due to?