COPD is a lung disease that makes it hard to breathe. In people with COPD, the airways (the branching tubes that carry air within the lungs) become narrow and damaged. This makes people feel out of breath and tired.
COPD can be a serious illness. It cannot be cured and it usually gets worse over time. But there are treatments that can help.
You might have heard COPD referred to as “chronic bronchitis” or “emphysema.” These are types of COPD.