Asthma | COPD
Lung disease is asthma and a chronic pulmonary obstruction disease (COPD). Both cause the airways to enlarge, which makes it impossible to respire. Swelling is often caused by asthma, such as pollen, mould and vigorous exercise, by anallergic effect. COPD has a label that encompasses the emphysema and chronic bronchitis of a group of lung diseases. Emphysema develops if the small bags in the lungs are harmed (so-called alveoli). Chronic bronchitis develops as the air-borne tubes (bronchial tubes) become inflamed. The most frequent cause of these disorders is smoking (and COPD).