Bronchiectasis is a chronic lung condition characterized by the permanent widening and damage of the airways, leading to mucus buildup and recurrent infections. It often results from previous lung infections, such as pneumonia or tuberculosis, or conditions like cystic fibrosis. Symptoms include a persistent cough, shortness of breath, and frequent respiratory infections. Managing bronchiectasis involves airway clearance techniques, medications to control infections and inflammation, and lifestyle changes to improve lung function and quality of life.