I feel pain below left shoulder and underarm?

my age is 25. I am high blood pressure patient. I get this pain randomly many times and day for few minutes and then it goes away. What could it be?

ryan552013-08-07T19:25:28Z

I don't know if its the same but I had something like that... I had a sharp pain in my right shoulder every time I moved it wrong way... I went to my doctor and it was a pinch nerve. That could be what you have.... Get it checked out...