Chest pain is partly related to physiologic factors, such as strenuous exercise or emotional stress. Excluding physiologic factors, pneumonia, pleurisy, lung cancer, and osteoarthritic lesions should be considered to cause the corresponding symptoms. 1. Physiological factors (1) Strenuous exercise: after strenuous exercise, the breathing amplitude increases, the mobility of the surrounding bones and joints increases, and the muscles are tense, which will cause pain and discomfort afterwards. (2) Emotional excitement: Emotional excitement, accelerated blood circulation, increased respiratory rate, after the body is calm, will cause the corresponding symptoms. 2. Pathological factors (1) Pneumonia: Pneumonia, repeated coughing or stimulation of the pleura, can also cause chest pain and discomfort, accompanied by fever. (2) Pleurisy: pleurisy will directly cause pleural irritation, causing pain and discomfort in the corresponding area. (3) Lung cancer: as the tumor progresses, it will cause invasion to the surrounding tissues and irritation to the pleura will also cause pain. (4) Bone and joint lesions: intercostal neuralgia, osteochondritis dissecans, trauma, etc. in the corresponding area will also cause pain and discomfort in the corresponding area. The appearance of pneumothorax, neuropathy, etc. can also cause corresponding symptoms. Once obvious chest pain occurs, accompanied by coughing, coughing up blood and other symptoms, you need to consult a doctor in time to observe and determine the specific conditions before doing standardized treatment.