Chest pain is a common acute symptom of coronary heart disease, usually due to the narrowing of coronary artery vessels and reduced blood flow due to coronary atherosclerosis. At this time, angina is often triggered by exertion, exercise, emotional stress, straining to defecate and other conditions that increase the burden on the heart, usually manifesting as a feeling of suffocation or burning in the chest. When angina attacks, the patient will suddenly feel a continuous crushing or chest tightness or burning sensation under the sternum. The patient should immediately stop all activities, calm down, rest on the spot, and immediately put a piece of nitroglycerin or a piece of heartburn chewed under the tongue, which can usually be relieved in about two minutes. If the effect is not good, after 10 minutes, you can take another piece under the tongue to increase the amount of medicine. However, it is important to note that regardless of whether the angina is relieved, or if it reoccurs, three tablets in a row without relief requires immediate medical attention to avoid danger. If you have been diagnosed with coronary heart disease before and the nature of the chest pain is the same as when you had the attack before, if the chest pain suddenly extends for more than 20 minutes, worsens and is accompanied by sweating, you should highly suspect the possibility of myocardial infarction and should immediately chew enteric aspirin 300mg and contact us immediately for medical consultation. In addition, if you have a history of hypertension with poor long-term blood pressure control and sudden severe tearing-like chest and abdominal pain, aortic coarctation should be highly suspected and aspirin should not be applied at this time, and you should seek immediate medical attention.