Is it normal that my entire right arm shakes when i flex my bicep?
This has been a life long thing. Basically, when I go to "make a muscle" with my right arm, the entire arm shakes like it's convulsing, but I have complete control over it. When I stop flexing, the shaking stops and does not continue. I can technically do this with my left arm also, but not to the same extent. What I can't do, however, is flex my right bicep without the entire arm shaking. Sometimes picking up something heavy with my right arm causes it to shake as well.