Multiple vesicular density shadows in both lungs usually need to be determined according to the cause to determine whether they are serious or not. Multiple vesicular density shadows in both lungs are usually considered to be caused by emphysema, bronchiectasis, pulmonary cysts, and pulmonary hernias. 1. Emphysema: Emphysema refers to the prolonged dilatation of the airways from the distal airspace to the end of the lungs, accompanied by damage to the alveolar walls and the fine bronchioles, and is usually accompanied by symptoms such as dyspnea and shortness of breath. Since patients with emphysema have difficulty in breathing, it is a serious condition. 2. Bronchial dilatation: It is mainly caused by repeated airway infections and inflammation, and usually has symptoms such as cough, purulent sputum and chest pain. Since bronchiectasis is prone to recurrent infections, it is a serious condition. 3. Lung cysts: Lung cysts are usually formed when various factors cause changes in the lung tissues, and may cause fever, cough and other symptoms, which are usually not serious. 4. Lung blisters: Lung blisters are air-containing cystic cavities formed when the pressure in the alveolar cavities rises due to various factors, and they usually have symptoms such as chest tightness and shortness of breath, hemoptysis, and chest pain. As patients with pulmonary pustules will have symptoms such as chest tightness and shortness of breath, they are usually not serious. It is recommended that patients go to the hospital for examination in a timely manner, at the same time, patients should quit smoking, in order to prevent smoking caused by vesicular density shadow aggravation, and also to relax and not too nervous, and actively cooperate with the treatment.