Lungs Breathing; Chronic lung disease is a term for a group of long-term conditions that affect the lungs. The most common conditions are a chronic obstructive pulmonary disease (COPD, also known as emphysema, chronic bronchitis), asthma, bronchiectasis, cystic fibrosis, pulmonary hypertension, interstitial lung disease, mesothelioma and lung cancer. These diseases are characterized by symptoms such as breathlessness and cough. Physiotherapy plays an important role in the management of lung disease by offering pulmonary rehabilitation (exercise training, education, and support), education on physical activity, airway clearance and breathing exercises.