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Chronic Obstructive Pulmonary Disease (COPD) is a group of diseases that cause airflow blockage and breathing-related problems . It is a chronic inflammatory lung disease that causes obstructed airflow from the lungs , which affects men and women worldwide . COPD makes it hard to breathe, as it damages the lungs in ways that make it hard to breathe  and can lead to alveoli (air sacs) in your lungs no longer functioning properly . It is characterized by long-term respiratory symptoms and airflow limitation . Treatment options are available for those with COPD, such as medications, lifestyle changes, oxygen therapy, pulmonary rehabilitation programs, surgery or lung transplantation.
: COPD - Symptoms and causes - Mayo Clinic (https://www.mayoclinic.org/diseases-conditions/copd/symptoms-causes/syc-20353679) : Chronic Obstructive Pulmonary Disease (COPD) | CDC (https://www.cdc.gov/copd/index.html) : Chronic obstructive pulmonary disease (COPD) (https://www.who.int/news-room/fact-sheets/detail/chronic-obstructive-pulmonary-disease-(copd)) : COPD - What Is COPD? | NHLBI, NIH (https://www.nhlbi.nih.gov/health/copd) : COPD (Chronic Obstructive Pulmonary Disease) (https://www.webmd.com/lung/copd/10-faqs-about-living-with-copd) : Chronic obstructive pulmonary disease - Wikipedia (https://en.wikipedia.org/wiki/Chronic_obstructive_pulmonary_disease)
Chronic Obstructive Pulmonary Disease (COPD) is a progressive lung disease that makes it difficult to breathe. It is caused by long-term exposure to irritants such as cigarette smoke, air pollution, and chemical fumes. Symptoms of COPD include shortness of breath, wheezing, chest tightness, and coughing with mucus production. Treatment for COPD includes medications such as bronchodilators and inhaled steroids to help open the airways; oxygen therapy; pulmonary rehabilitation; lifestyle changes such as quitting smoking; and surgery in some cases.