As you may know, patients with coronary heart disease often have chest pain, but not all chest pain is coronary heart disease. The following talk about the kind of chest pain that we should be alert to, such as this chest pain, it is important to go to the hospital cardiovascular department for examination as soon as possible. The typical chest pain that occurs in patients with coronary heart disease is medically known as angina pectoris. It is a painful reaction due to myocardial ischemia and thus hypoxia. The location of the pain is mostly in the precordial region, sometimes radiating to the pharynx, jaw, teeth, as well as the left shoulder, the left inner forearm and ring finger and little finger, and some patients show upper abdominal discomfort with nausea and vomiting; since angina is related to myocardial ischemia and hypoxia, there is often a trigger for the onset of chest pain, such as walking fast, exerting oneself, feeling tired, after emotional excitement (joy or anger), after a full meal, cold or windy weather conditions, and so on. Another characteristic of chest pain is that the attack is very uncomfortable, manifested as a feeling of constriction, blockage and pressure, and the pain is very severe, sometimes accompanied by a sense of dying, and the original activity must be stopped, rest or squatting for a while, and the duration is usually a few minutes, which can still be relieved, and continue walking, such as timely sublingual administration of The pain can also be relieved quickly if sublingual nitroglycerin is administered in time. If there is chest pain in line with the above pain location, nature, trigger, time and relief mode, should be highly alert, coronary heart disease, the diagnosis of angina pectoris is basically established. The reasons to be alert or pay attention to this kind of chest pain are: First, it may be a clinical early signal of coronary heart disease, early diagnosis and early intervention, of course, will have a good result; Second, this kind of chest pain if it lasts more than 30 minutes without relief, or frequent attacks will have myocardial necrosis, that is, myocardial infarction, the consequences are unimaginable.