I have C spine issues and syringomyelial and am possible ms (lucky me, huh, lol). And I get shocks from my hip socket down my leg, in mid back down, in my shoulder blades down my arms, hands and the sides of my head.
I'm a little lightning storm.
The shoulders/arms/hands I would think are from my neck problems. Who knows where the rest of them come from.
Elavil helped me too, but I also found I was way too tired. I was on 50 mgs. Yow.