What causes Pain that hurts in middle right chest with deep breath?

Answer:
I had that, so bad that I couldn't sleep or breath right. I think, but am not 100% sure, it was a pulled muscle in the chest for torn muscle, and when the lung inhales it pushes against it and causes pain. I think it could be from working out, over stressing the muscle? I took muscle relaxers at night before bed, plus A535 muscle rub on the painful spot, and it is almost completely gone after 1 week.
First answer by ID1254492217. Last edit by ID1254492217. Question popularity: 2 [recommend question].