Chronic obstructive pulmonary disease (
COPD), also known as
chronic obstructive lung disease (
COLD) and
chronic obstructive airway disease (
COAD), among others, is a type of
obstructive lung disease characterized by chronically poor airflow. It typically worsens over time. The main symptoms include
shortness of breath,
cough, and
sputum production. Most people with
chronic bronchitis have COPD.