I have a bruise on the inside of my upper left arm, between the bicep and tricep, and it isn't from an impact.
I get a sharp pain along the length of my arm if i raise it straight overhead and try to hang from a bar. The pain feels a bit like an electric shock. The bruise goes from my left armpit to about midway down the upper arm, but the pain travels further. Could it be a trapped nerve? What should i do?
Many thanks, Marc.