Pain
Arm maintained in abduction
Shoulder appears 'squared off' (loss of normal rounded appearance with stretching of the deltoid muscle)
Difficulty touching affected arm to contralateral shoulder due to pain
Risk of axillary artery rupture with reduction of chronic dislocation 
Patient with shoulder dislocated 3-4 weeks should be reduced only with orthopedic consultation, and likely in the operating theatre
Patient with shoulder dislocated 3-4 weeks should be reduced only with orthopedic consultation, and likely in the operating theatre
Anterior shoulder dislocation
Traumatic/Acute:
Posterior shoulder dislocation
Shoulder Dislocation
Shoulder dislocation
Inferior shoulder dislocation
Acromioclavicular joint injury
Sternoclavicular dislocation