It could be a rotator cuff injury. Does it hurt when you lift your arm above your head? you should go see a physiotherapist.
Cause of Shooting Pains. This is quite possibly from something pinching the nerve in your arm. It could be anything from a repetitive strain injury to a tumor next to the nerve. Try taking it easy...
my arm hurts what can i do an my two granmas r hurting as well really bad.
Could be tendonitis, a heart attack, a 5lb hammer, an arrow, bullet. Good guess.
a heart attack
stroke or heart attack, if that answers yurr question