KOAH, or Chronic Obstructive Pulmonary Disease (COPD), is a progressive lung disease that makes it difficult to breathe. It is primarily caused by long-term exposure to harmful substances, such as cigarette smoke and air pollution. Symptoms include persistent cough, shortness of breath, and wheezing, which can worsen over time. Diagnosis of KOAH typically involves lung function tests, imaging studies, and a review of medical history. While there is no cure, treatment options like medications, pulmonary rehabilitation, and lifestyle changes can help manage symptoms and improve quality of life for those affected.