Chest pain before exertion may be related to spontaneous pneumothorax, angina pectoris and other diseases, and may also be caused by soft tissue injury in the anterior chest. 1. spontaneous pneumothorax: in the absence of exogenous factors, rupture of lung parenchyma or visceral pleura occurs, leading to air accumulation in the pleural cavity from the lungs through the visceral pleura, which in turn leads to collapse of the lungs, and may be manifested as anterior chest pain, which is mostly accompanied by symptoms such as chest tightness and dyspnea. 2. angina pectoris: a clinical syndrome caused by acute ischemia and hypoxia of the myocardium due to insufficient blood supply of the coronary arteries, which is mostly manifested as crushing pain in the chest, and mostly occurs during physical labor or emotional excitement. 3. Soft tissue injury: it can be caused by trauma, strenuous exercise, excessive force caused by soft tissue injury in the anterior chest, excessive pulling of intercostal muscles, which can cause anterior chest pain with exertion, and the pain is relieved after resting or changing the body position. There may be other reasons for exertion anterior chest pain, it is recommended to go to the hospital as soon as possible, improve the examination to clarify the cause of the disease and standardize the treatment.