Yesterday, out of nowhere, my right lung started bothering me.  The pain is hard to describe, kind of a dull ache or a burning sensation.  Its located on the right side, but high up in my chest and close to the sternum.  I feel it when I take deep breaths, lie flat, or bend over.  Its not excruciating, but more of an annoyance.  Ive experienced this before, but it went away on its own after a few days.  Im just wondering what the possible causes could be?  Im not even sure if its lung related or cardiac?  Could it be costochondritis?
Hi welcome to Chat Doctor.... Here although chance less investigate your case with EKG ....to rule out cardiac cause if present ... Your auscultation should be done ... If suspicious than chest x-ray done for rule out resp causes ... If no significant cause found than it could be from Costco Chat Doctor. ... Take ibuprofen 200 mg for that ....for five days .... Warm compress applied ... Avoid strenuous work.... Heavy weight lifting avoided ... Take proper sleep posture. Take care Advise