Frozen Shoulder or Rotator Cuff Tear? Why Your Shoulder Won't Lift

A shoulder that suddenly refuses to lift is alarming, and two of the most common causes — frozen shoulder and a rotator cuff tear — can feel deceptively similar. They are treated very differently, though, so telling them apart matters.

Frozen shoulder, known medically as adhesive capsulitis, is a problem with the capsule surrounding the joint. The capsule thickens and tightens, and the shoulder becomes progressively stiffer and more painful. The hallmark is a loss of movement in every direction — you cannot lift the arm yourself, and someone else cannot move it for you either, because the joint itself has seized. It often appears without any clear injury and is more common in people with diabetes and in middle age.

A rotator cuff tear is different. The rotator cuff is a group of tendons that wrap the shoulder and lift and rotate the arm. When one tears — from a fall, lifting something heavy, or simple wear with age — the shoulder loses power rather than range. A telling sign is that you may struggle to lift your own arm, but another person can often move it for you. There is frequently weakness, and pain at night when lying on that side.

That distinction — a stiff joint that no one can move versus a weak joint that someone else can move — is the simplest way to tell them apart, though a proper examination and sometimes a scan confirm it.

Treatment follows the cause. Frozen shoulder usually improves with time, physiotherapy and sometimes an injection to settle the inflammation, though it can be a slow process measured in months. A rotator cuff tear may be managed with physiotherapy if small, but larger tears often need arthroscopic keyhole repair to restore strength.

If your shoulder has stopped cooperating, do not simply wait and hope. A short assessment at KT Hospital, Dindigul, will identify which problem you have and the fastest route back to a working shoulder.