Chest pain with dyspnea and normal chest radiographs are associated with abnormalities of the heart and thorax, and the main causes of the corresponding symptoms include coronary heart disease, costochondritis and intercostal neuralgia. 1. Coronary artery disease: Left-sided chest pain with obvious dyspnea, aggravated by exercise, is most likely due to insufficient blood supply to the myocardium caused by coronary artery stenosis. 2. Costal chondritis: inflammatory reaction of the costal cartilage will also have corresponding conditions, part of the chest wall can be seen through the local bulge, there is local pressure pain. 3. Intercostal neuralgia: Injury to the intercostal nerves will cause corresponding symptoms, usually accompanied by detrusor pain and respiratory restriction due to chest pain. After the neurological symptoms are controlled, there will be relief. When obvious chest pain with dyspnea occurs, it is necessary to consult a doctor in time, under the guidance of the clinician to carry out further screening, and carry out standardized treatment after diagnosing the specific cause to avoid delaying the condition.