Chest tightness and dyspnea are mainly considered for the following reasons: First, insufficient blood supply to the heart in coronary artery disease, such patients may previously have risk factors such as hypertension and diabetes mellitus, which can be relieved by rest at the onset of activity, and examination of electrocardiogram and cardiac ultrasound helps to make a clear diagnosis. Second, heart failure, this patient may have previous coronary heart disease, heart valve disease and other heart-based diseases, mainly manifested as varying degrees of dyspnea, accompanied by lower limb edema, examination of cardiac ultrasound can help clarify the diagnosis. Third, lung diseases, the most common is chronic obstructive pulmonary disease, can also appear dyspnea, chest tightness and shortness of breath, examination of chest CT and lung function can help clarify the diagnosis. Fourth, psychosomatic factors, such patients are often accompanied by tension and anxiety, sleep is also insufficient, as well as mental stress, its routine examination is normal, encourage patients to regular work and rest, regular exercise helps to improve.