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Chronic obstructive pulmonary disease (COPD) is a chronic and progressive lung disease that obstructs the airflow from the lungs. Emphysema and chronic bronchitis are the most common causes of airway obstruction. The symptoms of COPD are shortness of breath, wheezing, chest tightness, excess mucus production, persistent cough, fatigue, unintentional weight loss, swelling in ankle and feet, and chronic respiratory infections. Smoking is the main culprit behind COPD. COPD can cause complications like frequent respiratory infections, heart problems, lung cancer, pulmonary hypertension, and depression. It is essential for all COPD patients to stop smoking, and medicines like bronchodilators, steroids, antibiotics, and Theophylline is used in its treatment.