Young patients often have episodes of shortness of breath, dizziness, numbness in the hands and feet, and the onset of such symptoms is often related to mood swings or accompanied by sleep disorders, consider the patient may be a functional disease. In elderly patients with previous hypertension and diabetes, if shortness of breath, dizziness, and numbness in the hands and feet occur, it is necessary to improve electrocardiogram, cardiac ultrasound, cranial CT or magnetic resonance examination to clarify whether the patient has heart disease or cerebrovascular disease, and after excluding heart disease and cerebrovascular disease, shortness of breath, dizziness, and numbness in the hands and feet may also be considered as functional diseases.