Whether or not vague heart pain can cause sudden death needs to be determined by the specific cause and cannot be generalized. A variety of factors can cause vague heart pain, including emotional, neurological, and organic lesions. For example, intercostal neuritis, costochondritis, pneumothorax, pleurisy, pleural effusion, etc., there may be vague pain in the precordial region, and this condition usually does not cause sudden death. Myocardial ischemia, acute coronary syndrome, etc. will have a short period of vague heart pain, which may be relieved after rest or application of quick-acting heart pills. However, if the pain is recurrent, lengthening in duration and gradually increasing in severity, and cannot be relieved by the application of drugs, it should be noted that it may be a precursor of myocardial infarction and there is a risk of sudden death. Patients are advised to go to cardiovascular medicine department for electrocardiogram, cardiac ultrasound, coronary angiography and other examinations to clarify the cause of the disease and provide symptomatic treatment, as well as to ensure a relaxed mood and reasonable rest.