I had a pneumothorax following a surgery when i was 11. It wouldnt go away, and the docs thought that maybe there was a hole or someting from the first surgery, so they actually went back in again (another surgery) to see what was wrong. They found nothing, and after 6 weeks of being attached to chest tubees in one room in the hospital, it mysteriously got smaller and smaller and went away on its own.it was awful