Heart pain is commonly associated with angina and myocardial infarction. The pain is usually located behind the sternum and in front of the heart. The location varies greatly due to individual constitution. A common cause of heart pain is usually obstruction of the coronary arteries, resulting in ischemia and hypoxia of the distal myocardium. Acids produced by myocardial metabolism cannot be excreted in time, resulting in pain. As a result, the site of heart pain is usually located in the posterior and anterior chest area of the sternum. Due to metabolic factors, the extent of the pain is about the size of the palm of the hand, and the boundaries are not clear enough to be accurately described. Due to nerve co-transmission, some patients may have pain in other non-specific areas. Common sites are the left shoulder, inner left arm, ring finger, little finger, neck, pharynx or jaw, and upper abdomen. If the patient has symptoms of heart pain, it is recommended that the patient should go to the hospital to have an electrocardiogram and cardiac enzymology tests to make a clear diagnosis under the guidance of the doctor.