Shoulder instability, particularly of the glenohumeral joint, is common in nowadays medicine, ranging from minor subluxations to complete dislocations caused by trauma or hereditary factors. Anterior dislocations are the most prevalent, often necessitating surgical intervention for associated Bankart lesions. The incidence of traumatic shoulder instability is 1.7% in the general population, with significant recurrence rates. Multidirectional instability (MDI) is notable in patients with hypermobility conditions, increasing the risk of recurrent instability. The shoulder's stability depends on its complex anatomy, including ligaments, muscles, and neurovascular structures. The Stanmore Instability Classification helps categorize instability into structural and non-structural types. Imaging techniques such as MRI and MR arthrography are crucial for diagnosing ligamentous and labral injuries, but they are also essential for planning surgical repairs. Treatment involves both conservative rehabilitations, focusing on muscle strengthening and proprioception, and surgical interventions like Bankart repair and capsular shift, depending on the instability's type and severity. Effective management requires a comprehensive understanding of the shoulder's anatomy, accurate diagnosis, and individualized treatment plans to restore function and prevent recurrence. It is important to note that each patient must be viewed as an individual. Every information given in this thesis is retrospective statistics. The appropriate treatment and care must be provided for each patient individually.