A Look at COPD: Barrel Chest, Blue Lips & Other Signs | Chronic Obstructive Pulmonary disease Signs
COPD is a complex condition that is the result of chronic airway inflammation and progressive structural changes from prolonged exposure to irritants. The most common irritant is tobacco smoke.
People with this condition have damage to the airways and the air sacs inside their lungs. This damage makes it harder for people with COPD to breathe, making them feel short of breath.
COPD produces many outward symptoms, which slowly get worse over time. According to the American Lung Association, COPD is the third leading cause of death in the United States.
More than 11 million Americans have been diagnosed with the disease, and another estimated 24 million Americans have the disease but have not been diagnosed.

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