Chronic obstructive pulmonary disease
Chronic obstructive pulmonary disease (also known as COPD) is a condition that makes breathing difficult. COPD is a broad term that covers several lung conditions, including chronic bronchitis and emphysema. It usually develops because of long-term damage to the lungs from breathing in a harmful substance (such as cigarette smoke or chemical fumes).
The treatments available for COPD help people to breathe more easily, but they don't repair the damage to the lungs.