There are more causes of chest pain, which are considered from the following aspects: First, cardiovascular diseases, which are the most common, mainly acute coronary syndrome, angina pectoris, myocarditis, and even acute myocardial infarction, may show the performance of chest pain, which should be further clarified by timely improvement of relevant examinations. Second, lung-related diseases, such as acute pleurisy, pneumothorax, serious lung infections, etc. Thirdly, it may be a symptom of breast enlargement in women, which may show periodic swelling and pain, and may also involve the armpits, especially before the onset of vacation, and then reduce or even disappear after vacation. Fourth, it is possible that before strenuous activities, there is a lack of adequate preparation for the manifestation of bronchitis, mainly bilateral pain under the ribs, but also may be the performance of respiratory muscle spasm due to shallow and rapid breathing caused by adverse stimulation.