Interstitial Lung Disease (ILD) is a group of lung diseases that affect the interstitium, the tissue and space around the air sacs of the lungs. It is characterized by inflammation and scarring of the lung tissue, which can lead to difficulty breathing, coughing, and other symptoms. ILD can be caused by a variety of factors, including environmental exposures, certain medications, and autoimmune diseases. Treatment for ILD depends on the underlying cause and may include medications, oxygen therapy, and lifestyle changes.