<unk>  is a type of chronic obstructive pulmonary disease (COPD) involving damage to the air sacs (alveoli) in the lungs. As a result, airflow is impeded and your body does not get the oxygen it needs.<unk>  makes it hard to catch your breath. You may also have a chronic cough and have trouble breathing during exercise.
Emphysema
Pleurisy
Chronic bronchitis
Atelectasis
Empyema
Trapped lung
Bronchiectasis
Acute bronchitis