When elderly people have difficulty in wheezing, the possibility of acute exacerbation of chronic obstructive pulmonary disease and acute cardiac insufficiency are mainly considered, as follows: First, acute exacerbation of chronic obstructive pulmonary disease: chronic obstructive pulmonary disease, referred to as slow obstructive pulmonary disease, is a chronic airway inflammatory disease. In the acute exacerbation period due to the chronic inflammation of the airway, so it will affect the respiratory airflow, resulting in the symptoms of wheezing difficulty, can improve the lung function test and lung CT examination for clarification. Second, acute cardiac insufficiency: that is, the possibility of heart failure, especially in elderly people who have hypertension and coronary heart disease. The dyspnea is usually manifested as exertional dyspnea or paroxysmal dyspnea during sleep at night, which can be clarified by timely improvement of cardiac ultrasound, electrocardiogram and other related examinations. In addition, there are also some elderly people who have lung tumors, such as airway obstruction caused by lung cancer, which may cause dyspnea, and they also need to improve the lung CT examination to clarify.