The chest wall is directly impacted by violence or squeezed chest wall, not enough to fracture the ribs, or due to the uncoordinated force of both hands when carrying heavy objects and cause the chest wall muscles, fascia, intercostal nerves, blood vessels, etc. pulling damage and cause local swelling, pain, etc. resulting in chest wall soft tissue, periosteum injury, called chest contusion. Progressive hemothorax due to laceration of organ tissues is the main cause of rapid progression of injury and patient death. Thoracic contusion is a manifestation of chest injury. Local signs of thoracic contusion vary according to the nature and severity of the injury and may include chest wall contusion, thoracic deformity, paradoxical respiratory movements, subcutaneous emphysema, local pressure pain, bone friction sounds and tracheal and cardiac displacement signs. Percussion of the chest: bulbous sounds for air accumulation and turbid sounds for blood accumulation. Auscultation: decreased or absent breath sounds, or sputum sounds and rales can be heard. Thoracic contusion, post-injury pain is obvious, more limited, with clear pressure points, located at the ribs or intercostal space. Local swelling, bruising and ecchymosis can be seen, which can be complicated by rib fractures and pneumothorax in severe cases. So what tests need to be done after a chest contusion? MRI: Nuclear magnetic resonance (NMR) is a physical phenomenon, abbreviated as NMR, or Nuclear Magnetic Resonance, which science defines as a physical phenomenon that occurs when an atomic nucleus in a static magnetic field is under the action of another alternating electromagnetic field. Nuclear magnetic resonance (NMR) is a technique that uses NMR to obtain information about the structure of molecules and the internal structure of the human body. It can directly make cross-sectional, sagittal, coronal and various oblique body images, and does not produce the artifacts in CT detection; does not require contrast injection; does not have ionizing radiation, and has less adverse effects on the body. Generally speaking, MRI is biased toward the examination of soft tissues, and MRI soft tissue resolution is high. CT examination: CT is the abbreviation of electronic computerized X-ray tomography, a condition detection instrument. It can examine various parts of the human body and discover the condition with high resolution and sensitivity. X-ray examination: Fluoroscopy is simple and easy to obtain the examination results immediately, and the morphology and function of organs can be observed at the same time. X-ray examination involves all parts of the body through various methods such as conventional fluoroscopy, radiography, and imaging of various body cavities and tubes. It can locate and characterize the lesion as well as understand the size, quantity and scope of the lesion. As long as all kinds of X-ray examinations are reasonably applied and well combined with clinical history, physical signs and other examinations, it is possible to achieve the purpose of confirming the diagnosis.