Idiopathic Pulmonary Fibrosis (IPF) Download English PDF, 1.11MB, PDF Download Chinese PDF, 741KB, PDF Idiopathic Pulmonary Fibrosis (IPF) is a progressive lung condition which causes scarring of the tissues (fibrosis) around the air sacs in the lungs. This scarring reduces the efficiency of oxygen and carbon dioxide exchange within the lungs and causes difficulty in breathing. Read on to find out more about the symptoms of IPF, how IPF can be diagnosed and how IPF can be treated. [Please download the PDF file if you are unable to view the image below.]