Coloured 3D computed tomography (CT) scan of a right lung with interstitial lung disease (ILD). ILD is a chronic condition that causes inflammation and scarring in the lungs, making it difficult for them to get enough oxygen. In this lung, fibrosis (purple) is affecting the lower lobe, leading to destruction of the air sacs (alveoli) and a decrease in lung volume. Some common symptoms of ILD include shortness of breath and a dry cough. This condition can be caused by exposure to certain medications, radiation, or harmful substances. Fibrosis that occurs in ILD cannot be reversed. However, treatments to manage symptoms may include anti-inflammatory medications and oxygen therapy.