Persistent and severe shoulder pain, often due to dislocation of the shoulder joint. There is a clear history of trauma. Traumatic anterior shoulder dislocation is associated with a history of trauma, shoulder pain, swelling and dysfunction. The injured limb is flexibly fixed in a mildly abducted internal rotation position with the elbow flexed and the affected forearm supported by the healthy hand. What are the tests for persistent and severe shoulder pain? 1.Magnetic resonance imaging (MRI) MRI, also known as magnetic resonance imaging, uses the principle of nuclear magnetic resonance to detect the electromagnetic waves emitted through an applied gradient magnetic field, which can be used to map the internal structure of an object. 2.X-ray examination Any suspected fracture should be routinely X-rayed, which can show incomplete fractures, deep fractures, intra-articular fractures and small avulsion fractures that are difficult to detect clinically, even if the fracture is clinically obvious, X-ray examination is also necessary to understand the type of fracture and the specific situation, which is of guiding significance for treatment. 3.CT examination For fractures that are not clear but cannot be ruled out, spinal fractures that may compress spinal nerve roots and complex fractures, CT examination is feasible. Three-dimensional CT reconstruction can be more intuitive and convenient for fracture typing, which is very helpful for treatment plan selection and is commonly used in clinical practice. Traumatic anterior shoulder dislocation is characterized by a history of trauma, shoulder pain, swelling, and dysfunction. The injured limb is flexibly fixed in a mildly abducted internal rotation position with the elbow flexed and the affected forearm supported by the healthy hand. The appearance is a “square shoulder” deformity, with the shoulder crest protruding significantly and the subacromial hollow. The head of the humerus can be felt in the axilla, under the rostral process or under the clavicle. The injured limb is mildly abducted and cannot be held against the chest wall, such as when the elbow is placed against the chest, the palm of the hand cannot touch the opposite shoulder at the same time (Dugas sign, i.e. positive shoulder hitch test). X-ray examination can clarify the type of dislocation and determine the presence or absence of fracture.