If the patient has chest pain and tightness, especially if it lasts for a long time, and the symptoms are not significantly relieved after taking nitroglycerin or salvia drops, the patient is highly considered to have an acute myocardial infarction. It is highly considered that acute myocardial infarction has occurred. It is suggested that the patient can first undergo electrocardiogram and cardiac enzyme preliminary examination, and if necessary, further coronary angiography can be performed. If the patient has long-standing chest tightness and chest pain, and is not currently menopausal, or is often tired or stays up late, it is highly considered to be caused by cardiac neurosis. Patients are advised to perform cardiac ultrasound, electrocardiogram and coronary CT to help clarify the presence of organic lesions at present. In addition, in some patients, the discomfort may be due to coronary artery myocardial bridge, or X syndrome, or may be due to spasm of the coronary vessels, and the patient is advised to improve the symptoms in combination with lifestyle interventions, regardless of the cause.