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Pulmonary fibrosis. Overview. Pulmonary fibrosis Pulmonary fibrosis scars and thickens the tissue around and between the air sacs (alveoli) in your lungs, as shown on the right. A normal lung with normal alveoli is shown on the left. Pulmonary fibrosis is a lung disease that occurs when lung tissue becomes damaged and scarred. This thickened, stiff tissue makes it more difficult for your lungs to work properly. As pulmonary fibrosis worsens, you become progressively more short of breath. The scarring associated with pulmonary fibrosis can be caused by a multitude of factors.
Idiopathic pulmonary fibrosis is a type of chronic lung disease characterized by a progressive and irreversible decline in lung function. Symptoms typically include gradual onset of shortness of breath and a dry cough. Other changes may include feeling tired and nail clubbing. Complications may include pulmonary hypertension, heart failure, pneumonia, or pulmonary embolism. The cause is unknown. Risk factors include a cigarette smoking, certain viral infections, and a family history of the condi