The incidence of myocardial infarction is gradually increasing, and a typical myocardial infarction may present with chest pain, located in the precordial region, in a crushing pain. However, myocardial infarction may still present with other symptoms, such as chest tightness, toothache, neck not, numbness in the left upper extremity, and upper abdominal discomfort. Some diabetic patients are even asymptomatic due to abnormal nerve conduction. Chest pain: The typical manifestation of myocardial infarction is chest pain, located in the precordial region, with crushing pain, and the pain is persistent, unrelieved, and may be accompanied by cold sweats. Chest tightness: The attack site is located in the precordial area, presenting chest tightness with dyspnea, and some acute anterior myocardial infarction may present with acute left heart failure, resulting in inability to lie flat after chest tightness. Neck and dental discomfort: Because cardiac nerve pain can radiate to atypical sites, some of them present with neck and dental pain that is persistent and unremitting, which patients can easily take lightly. Left upper extremity numbness: Some may present with left upper extremity numbness or even unrelieved pain. Upper abdominal discomfort: Some patients present with discomfort above the umbilicus, such as pain, nausea and vomiting, which is especially common in inferior wall myocardial infarction. Asymptomatic: without any discomfort, especially seen in diabetic patients, the onset of which may be directly followed by sudden death, or even myocardial abnormalities found on physical examination. The clinical manifestations of myocardial infarction are varied, and chest pain in the precordial region is still the most common symptom. However, other symptoms, still need to be noted, up to the teeth, down to discomfort above the umbilicus need to consider the risk of myocardial infarction.