The easiest way to determine chest pain is to look at the onset time of chest pain, its relationship to body position and the characteristics of pain to determine the type of chest pain. 1. The onset time of chest pain: it can be divided into acute and chronic, acute chest pain can start rapidly within minutes, which can be seen in pulmonary embolism, pneumothorax and acute myocardial infarction, etc. Chronic chest pain has a slow onset and a longer course, which can be seen in posterior mediastinal tumor, gastroesophageal reflux disease, etc. 2. Relationship with body position: chest pain caused by esophagitis will be aggravated when lying on the back after a full meal, while chest pain caused by pericarditis will be reduced when sitting up or standing up. 3. Characteristics of pain: if the patient is angina pectoris, the pain will be manifested as boring pain and accompanied by a sense of suffocation, while the pain of myocardial infarction will be more intense and have a sense of near death. The simple way to determine the chest pain can not represent the results of the hospital examination, if the patient has symptoms of chest pain, it is recommended to go to the regular hospital to receive examination, and follow the doctor’s instructions for treatment, so as not to delay the condition.