text: depedning on your living conditions and work conditions what you breathe in. people who work in coal mines, factorys and weld get a lot of gunk in their lungs. There is a disease called pulmonary fibrosis. this is irreversable I am more familar with black lung due to the area I grew up in and work in. My father had black lung, you can wear special respirator masks while you are around what ever the fiber etc is you are being exposed to. you need to go to a pumonologist for the proper test and management of the problem