I have these electric shocks from my shoulder to my elbow but sometimes to as far as my end of my hand. They usually last less then a sec and I ve had them for about 2 months. I only feel it in my left arm. The 2nd time I ve ever had it, I remember laughing and holding something in my left hand, then it shot up my neck down to my hand making me to drop my item. As a child, I played piano and my left hand had always been weaker than my right hand. When I work out my arms, I more likely have one. What exactly is my problem and how can I solve it?