The first thing to consider is the lack of blood supply to the heart muscle and the absence of pulmonary embolism and myocardial infarction. Inadequate myocardial blood supply, manifested as chest tightness and shortness of breath, sometimes feel chest pain, then you can do an electrocardiogram to observe whether the ST segment is depressed, whether the T wave is inverted, and then see whether the ST segment is elevated, whether there are signs of myocardial infarction, if necessary, CTA, cardiography, to see whether there is myocardial infarction. Check whether the D-dimer is high, see if there is a thrombus in the veins of the lower extremities, resulting in thrombus dislodgement, leading to myocardial infarction or pulmonary embolism, combined with ECG, cardiac ultrasound, changes in blood pressure of the patient’s upper extremities, blood lipids, blood sugar, after a clear diagnosis is recommended under the guidance of the doctor oral medication to exclude myocardial infarction, pulmonary embolism, aortic coarctation and other lesions, the patient oral medication, general chest pain can be relieved.