Menu Healthy Lifestyle Diseases & Conditions First Aid Symptoms Tests & Procedures Videos Definitions FAQs PneumonitisUpdated: 2017-06-13OverviewPneumonitis is a general term for inflamed lung tissue. Although pneumonia is a type of pneumonitis, most doctors use the term to refer to other causes of lung inflammation. These may include airborne irritants, such as mold, certain drugs, and radiation treatment to the chest.TreatmentsTreatment usually starts with irritant avoidance. © 1998-2022 Mayo Foundation for Medical Education and Research(MFMER). All rights reserved. Terms of Use