Video narration
Why can breathing out become harder in COPD, when breathing in seems like the problem? Imagine pushing air through a narrow straw. It gives you the feeling, but it doesn't capture all the lung damage. One change is in the airways: ongoing irritation swells them, and extra mucus narrows the route air must leave through. This is chronic bronchitis: irritated, mucus-filled airways that restrict airflow. Another pattern is emphysema, where damaged air sacs lose their spring. Normally, that spring helps push air out; without it, small airways can collapse during exhalation. The problem isn't simply getting air in. Damaged lungs can struggle to push air back out. The two patterns can overlap, but the mix differs between people. So why is breathing out hard? COPD narrows the airways and damages air sacs, trapping air and leaving less room for your next breath.