Can any doc tell me what's pulmonary fibrosis and is it often fatal or is it just chronic?

Scar tissue in lungs: Many things can cause scar in the lung.Pulmonary fibrosis(ild) is a progressive disease. Need to r/o cause that are treatable. Some cases require a lung transplant. Need to be diagnosis by pulmonary md and some cases require lung biopsy. Need lung test(pft) and ct of chest.Symptoms are progressive shortness of breath typically. Other diagnosis must be excluded. Follow up with your md.