The disease that takes your breath away. Pulmonary fibrosis (PF) is a process that causes lung scarring, in which fibrotic tissue blocks the movement of oxygen from inside the tiny air sacs in the lungs into the bloodstream. The word “pulmonary” means lung and the word “fibrosis” means scar tissue— similar to scars that form on the skin from an old injury or surgery. 💙💚 At the Pulmonary Fibrosis Foundation (PFF), we are here to guide, support, and empower you at every step of your journey. Fro