I have a severe pain in my chest on the right side of my lung. How I know is because it only hurts when I inhale or exhale at least that's my opinion. Now this pain is very painfull it comes and it goes sometimes once a day and sometimes once a week. So it verys. I have not been to doctor or hospital to get checked out. The best way to describe it is it feels like my lung is going to brust or bust in some way.