A widespread, preventable, and curable chronic lung illness that affects both men and women worldwide is chronic obstructive pulmonary disease (COPD).Airflow into and out of the lungs is restricted as a result of abnormalities in the tiny airways of the lungs. The airways constrict due to a number of factors. Parts of the lung may be destroyed, the airways may be obstructed by mucus, and the lining of the airways may become inflamed and swollen. Chronic bronchitis or emphysema is other names for COPD. Emphysema often refers to the lungs' small air sacs at the end of airways being destroyed. A chronic cough that produces phlegm as a result of airway irritation is referred to as chronic bronchitis. People find it increasingly challenging to do their typical daily tasks when COPD worsens, frequently owing to dyspnea. Due to reduced productivity at work and at home, as well as the expense of medical care, there may be a significant financial burden. People with COPD may require additional home care or admission to the hospital for emergency care when their symptoms worsen during flare-ups. Life threatening flare-ups can happen. In addition to COPD, many people with this disease also suffer from heart disease, osteoporosis, musculoskeletal problems, lung cancer, depression, and anxiety. The symptoms of COPD cannot be cured, but early detection and treatment can decrease their progression and lower the likelihood of flare-ups. If a person exhibits the usual symptoms of COPD, COPD should be suspected, and spirometry-a breathing test that gauges lung function—should be used to confirm the diagnosis. Spirometry is frequently unavailable in low- and middle-income nations, making it possible that the diagnosis may go unnoticed.