Chest wall pain (chestwallpain) is also known as musculoskeletal pain (musculoskeletalpain). The pain is concentrated in only one spot and the patient can clearly point it out. It does not last long, usually only one or two seconds at a time, with a chance of recurrence. The stabbing, even severe, pain in the chest occurs when the patient breathes deeply, coughs, sneezes, or turns around. The pain may be more intense than the chest pain caused by other diseases, but most of it resolves within a few days to two or three weeks. It can occur at any age. Clinicians point out that when diagnosing chest wall pain, it is important to have a comprehensive clinical picture of the patient, combined with a thorough analysis of the medical history and clinical symptoms. The diagnosis of chest wall pain should first distinguish between chest wall pain originating from chest wall or internal organ lesions, and if the lesion is definitely from the internal organs of the chest, it should be further diagnosed as the localization, characterization and etiology of the lesion. Secondly, some laboratory tests or instrumentation can be used to confirm the diagnosis. 1.Physical examination Chest wall disorders can be determined by visual examination and palpation. While the internal organs of the chest disorders must be detailed physical details, visual diagnosis of unilateral thoracic drinking full should phase to pleural effusion. Tactile fibrillation should be seen in pneumonia, percussion turbid or solid sound should be considered to pneumonia, pulmonary infarction, lung cancer, pleural mesothelioma; percussion drum sound should be considered to pneumothorax. In the case of angina pectoris and myocardial infarction, the heart border is normal or enlarged, and the heart rate is increased with abnormal findings on auscultation. If the abdomen is diseased, there are corresponding abdominal signs. 2, laboratory tests Blood routine is a routine check, the change of white blood cells can provide a certain basis. Bacteriological examination of sputum can determine the pathogenic bacteria of pneumonia and tuberculosis, and exfoliative cytology examination can help to diagnose lung cancer. Laboratory and cytological examination of cerebral and pericardial cavity puncture fluid are useful for diagnosis. Increased blood and urine myoglobin and increased serum cardiac enzymes are helpful for the diagnosis of acute myocardial infarction. 3.Device examination The diagnosis of thoracic visceral organ disorders should be determined with the help of relevant devices, such as electrocardiography, which is helpful for the diagnosis of angina pectoris and acute myocardial infarction. Echocardiography is important for the diagnosis of pericardial effusion and the observation of the amount of effusion, and for the diagnosis of valvular disease. CT examination has high resolution and high diagnostic readiness and sensitivity. MRI examination has the advantages of coronal and sagittal tomography and better resolution of soft tissue in the mediastinum. MRI has the advantages of higher resolution, direct three-dimensional and even oblique cross-sectional imaging at any angle, which is more conducive to the display and localization of lesions.