Shoulder Impingement or Frozen Shoulder - What's the Difference?

Frozen shoulder, or adhesive capsulitis, is a condition characterized by progressive shoulder pain and significant loss of both active and passive range of motion. Unlike many other shoulder disorders, frozen shoulder is not driven by structural damage such as tears or impingement, but rather by chronic inflammation and subsequent fibrosis of the joint capsule. The capsule thickens, contracts, and adheres to itself, reducing the volume of the glenohumeral joint and limiting movement in multiple directions—most notably external rotation. Frozen shoulder occurs most frequently in adults between 40 and 60 years of age. It is significantly more common in individuals with diabetes, thyroid disease, or autoimmune disorders. It may develop spontaneously ("primary" adhesive capsulitis), or following injury or surgery ("secondary" adhesive capsulitis). Because the condition affects both active and passive motion, and because rotator cuff strength is typically preserved, it presents a distinct clinical picture compared to other shoulder injuries. While the condition can be profoundly limiting, long-term outcomes are generally good, with most people eventually regaining near-normal function. Treatment focuses on symptom management, staged rehabilitation, and maintaining safe mobility during each phase of the condition. For more information, please visit our website: www.nielasher.com