Bronchiectasis refers to the destruction of bronchial wall tissues caused by chronic inflammation of the bronchi and surrounding lung tissues. The lumen undergoes irreversible dilation and deformation. Some patients have a history of recurrent respiratory tract infections, mainly presenting with chronic coughing and coughing up large amounts of thick sputum. Many patients have a history of repeated hemoptysis, although the amount of blood is usually small. There can be blood in the sputum or slight bleeding, and it can also manifest as a large amount of blood, potentially life-threatening. In the affected areas, fixed and persistent localized wet rales can be heard.