If a patient feels precordial pain, the common causes are as follows: Firstly, we should exclude whether it is cardiac neurosis, that is, the heart does not have organic lesions, and it is precordial pain secondary to plant nerve dysfunction, such as excessive nerve tension or sympathetic hyperexcitation, in which case there will also be symptoms of cardiac pain. Secondly, after excluding the above-mentioned causes, when feeling heart pain, we should consider whether it is high-risk chest pain, such as acute coronary syndrome, myocardial infarction, pulmonary embolism, or aortic coarctation, in which case there will also be pain in the precordial region, but the pain is usually more intense and lasts for a relatively long time. Then in some cases of unstable angina, the patient may also have heart pain. Finally, patients with respiratory diseases such as massive pneumonia, lung infection, or intercostal chondromalacia or intercostal neuralgia may also experience heart pain in this condition.