The bones, ligaments and tendons that make up your shoulder joint are encased in a capsule of connective tissue. Frozen shoulder occurs when this capsule thickens and tightens around the shoulder joint, restricting its movement.
Doctors aren’t sure why this happens to some people, although it’s more likely to occur in people who have diabetes or those who recently had to immobilize their shoulder for a long period, such as after surgery or an arm fracture.
Risk factors of The bones
Certain factors may increase your risk of developing frozen shoulder.
Age and sex
People 40 and older, particularly women, are more likely to have frozen shoulder.
Immobility or reduced mobility
People who’ve had prolonged immobility or reduced mobility of the shoulder are at higher risk of developing frozen shoulder. Immobility may be the result of many factors, including:
- Rotator cuff injury
- Broken arm
- Recovery from surgery
People who have certain diseases appear more likely to develop frozen shoulder. Diseases that might increase risk include:
- Overactive thyroid (hyperthyroidism)
- Underactive thyroid (hypothyroidism)
- Cardiovascular disease
- Parkinson’s disease
One of the most common causes of frozen shoulder is the immobility that may result during recovery from a shoulder injury, broken arm or a stroke. If you’ve had an injury that makes it difficult to move your shoulder, talk to your doctor about exercises you can do to maintain the range of motion in your shoulder joint.
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