There is no known cause of IPF. Ad Patient Struggling With IPF. Idiopathic Pulmonary Fibrosis Is A Condition That Involves Progressive Scarring Of The Lungs Learn Pulmonary Fibrosis Idiopathic Pulmonary Fibrosis Pulmonary This thickened stiff tissue makes it more difficult for your lungs to work. . Idiopathic pulmonary fibrosis or IPF is a progressive lung disease. Researchers believe some things you may have breathed in. Pulmonary fibrosis PF is a form of interstitial lung disease that causes scarring in the lungs. Sacs of the lungs. So in its simplest sense pulmonary fibrosis. Thats the case with IPF. This symptom usually begins or develops. Pulmonary fibrosis is a lung disease that occurs when lung tissue becomes damaged and scarred. Idiopathic pulmonary fibrosis IPF is a rare lung disease that causes scar tissue to grow inside your lungs. Learn More About a Treatment Option That May He...