Shoulder dislocation and instability represent a spectrum of injuries affecting the glenohumeral joint, with significant implications for patient outcomes. This chapter provides a comprehensive analysis of the pathophysiology, diagnosis, and management strategies for anterior, inferior, and superior shoulder instability. Epidemiology and biomechanics are explored to understand the mechanisms contributing to recurrent instability. Anatomical considerations, including labral pathology and ligamentous laxity, are critically examined to highlight their role in dislocation patterns. Diagnostic methodologies, including advanced physical examination techniques, imaging modalities, and relevant classification systems, are discussed to guide clinical decision-making. Treatment approaches span conservative management to surgical interventions, with a focus on individualized treatment plans. Rehabilitation protocols aimed at optimizing recovery and ensuring a safe return to activity are also covered. The chapter reviews outcomes associated with both surgical and nonsurgical management, emphasizing patient-specific factors and potential complications. Challenges in the treatment of different instability types are addressed, along with a discussion of unresolved issues in the field. This chapter aims to provide clinicians with the necessary knowledge to effectively manage shoulder dislocation and instability, ultimately enhancing patient care and promoting functional recovery.