hi, what do you think happened to my arm, i've been suffering with pain on my upper arm mid way up from the elbow and down from the shoulder. I do not remember hitting nor pulled any muscle, but it seems more like a tear. I cannot move my arm back any type of movement backwards or even trying to stretch it back or even something heavy i have to let it go. i just noticed today," dont mean to be a bit graphic" so i apologize.. i used the bathroom and just pulling my pants down , i suddenly grabbed hold of my arm and i was in so much pain it took a bit more longer for the pain to go away. What can you tell me about this pain. I am going to get it x-ray done, i just want to know so i know what to expect just to ease some questions right now. Please help me identify what the issue might be.