The following cases are considered: 1. In elderly people with a history of coronary heart disease, hypertension and diabetes, when angina attack occurs, there will be vague pain in the back, and at the same time, there will be chest tightness, shortness of breath, pain in the precordial area, etc. Most of these symptoms occur under the stimulus of exertion or mood swings, and the symptoms can be relieved after rest or nitroglycerin. The symptoms can be relieved after rest or nitroglycerin.2. We cannot rule out the presence of acute myocardial infarction, and some patients will have vague pain when acute myocardial infarction occurs. The patient will have to go to the hospital to check the electrocardiogram and blood analysis to rule out the possibility of myocardial infarction. 3. Patients with intercostal neuralgia will also have pain in front of the ribs or in the back, and the pain will be longer, and the symptoms will be aggravated by pressing on the painful parts. 4. Patients with cardiovascular neuropathy will have more obvious subjective symptoms, and will often have pain in the back or in the precordial area, and the symptoms cannot be relieved by rest. Psychological treatment methods can be given.