Chronic obstructive pulmonary disease (COPD) involves chronic bronchitis and emphysema, where the airways become narrowed, limiting air flow in and out of the lungs and causing shortness of breath. COPD occurs when the airways and air sacs lose elasticity, air sac walls are destroyed, airway walls become thick and inflamed, and mucus production increases, clogging the airways. The main causes of COPD are cigarette smoking, exposure to occupational dusts and chemicals, and air pollution. The diagnostic evaluation of COPD includes medical history, pulmonary function tests, chest imaging, and examination of mucus. Management involves bronchodilators, anti-cholinergic agents, glucoc