What is Bronchiectasis? Bronchiectasis (bron-kee-eck-tuh-sis) is a chronic lung condition that affects the airways (or bronchi) of one or both lungs, causing them to become abnormally widened, scarred, and inflamed. Injured airways have difficulty removing mucus, which is critical to clearing germs, dust, and other particles around us. This leads to a buildup of mucus […]