Chronic Obstructive Pulmonary Disease (COPD) refers to a group of lung diseases including chronic bronchitis and emphysema. The main symptoms are shortness of breath and reduced activity levels that worsen over time. Smoking is the leading cause and damages the lungs by destroying elastic fibers in the air sacs. Treatment focuses on quitting smoking and managing symptoms through medications, supplemental oxygen, pulmonary rehabilitation, and sometimes surgery. Yoga practices like breathing exercises and poses can help relieve symptoms and reduce stress.