Other common types of ILD include:
sarcoidosis
extrinsic allergic alveolitis (EAA)
ILD caused by drug side effects
ILD associated with collagen vascular diseases.
When you have ILD, inflammation or scar tissue builds up in your lungs, making them thick and hard. This build-up of scar tissue is called fibrosis. As your lungs become stiffer and lose their elasticity, they are less able to take oxygen from the air you breathe. People with ILD can feel breathless from simple everyday activities like walking. Coughing is another common symptom.