The shortness of breath and chest tightness that occur after exertion, which is also related to activity tolerance, and the feeling that one does not have enough air, need to exclude heart or respiratory system diseases. Especially for patients with hypertension, diabetes and coronary artery disease, consider whether there is a combination of heart failure. For patients with chronic obstructive pulmonary disease, consider whether there is a combination of chronic pulmonary heart disease and whether it is accompanied by edema of both lower limbs. Post-exertional dyspnea must be improved with electrocardiogram, chest CT, cardiac ultrasound and pulmonary function tests to clarify the cause before symptomatic treatment.