Frozen Shoulder Clinical Characteristics and Management

Definition and Clinical Characteristics

The American College of Physical Medicine and Rehabilitation suggests that frozen shoulder is characterized by equal restriction in both active and passive range of motion, distinguishing it from rotator cuff pathology where passive motion may be preserved 1
The American Academy of Orthopaedic Surgeons notes that frozen shoulder is marked by no focal weakness on resistance testing, unlike rotator cuff tears 1
The American College of Rheumatology states that frozen shoulder is characterized by the absence of swelling or muscle atrophy on physical examination 1

The American Heart Association reports that up to 72% of stroke patients experience at least one episode of shoulder pain during the first year, with up to 67% incidence of shoulder-hand-pain syndrome in stroke patients with combined motor, sensory, and visuoperceptual deficits 2, 1, 3
The American Stroke Association recommends avoiding improper handling during rehabilitation, particularly overhead pulley exercises that encourage uncontrolled abduction, as they can worsen shoulder complications in post-stroke patients 2, 3, 1
The National Institute of Neurological Disorders and Stroke notes that shoulder subluxation and motor weakness are strong predictive factors for frozen shoulder in post-stroke patients 4, 5

The American College of Sports Medicine suggests that the rotator interval and axillary recess are the primary anatomical structures involved in capsular thickening and contracture in frozen shoulder 3
The American Academy of Physical Medicine and Rehabilitation states that shoulder tissue injury, including effusion, tendinopathy, or rotator cuff tears, is found in approximately one-third of acute stroke patients and contributes to the development of frozen shoulder 4, 5, 3

The American Academy of Orthopaedic Surgeons notes that external rotation is the most significantly affected motion in frozen shoulder and relates most strongly to shoulder pain onset 2, 1
The American College of Rheumatology reports that abduction is severely restricted in frozen shoulder, with internal rotation being the least affected, creating the classic capsular pattern: external rotation > abduction > internal rotation 3, 1
The American College of Physical Medicine and Rehabilitation states that both active and passive motion are equally restricted in frozen shoulder 1

The American Academy of Orthopaedic Surgeons recommends not confusing frozen shoulder with rotator cuff pathology, as rotator cuff tears show focal weakness with specific resistance testing, whereas frozen shoulder demonstrates equal restriction in both active and passive motion 1
The American Heart Association advises avoiding overhead pulley exercises in at-risk patients, especially post-stroke, as they can worsen shoulder complications 2, 1

In patients with adhesive capsulitis whose pain is associated with rotator‑cuff or bursal inflammation, the sub‑acromial space should be targeted for intra‑articular corticosteroid injection. 6
When capsular involvement is predominant, a glenohumeral joint injection is recommended to deliver the corticosteroid directly to the joint capsule. 7

Gentle stretching and mobilization that emphasize external rotation and abduction— the motions most limited in frozen shoulder— should be prioritized as the core of the home‑exercise program. 6
After initiating gentle stretches, active range‑of‑motion exercises should be progressed gradually while simultaneously restoring shoulder‑girdle alignment and strengthening the surrounding musculature. 6
Aggressive passive range‑of‑motion techniques and overhead pulley exercises are discouraged because improper execution can exacerbate shoulder complications, especially in patients with neurologic impairment. 7

For routine pain control in adhesive capsulitis, acetaminophen or ibuprofen may be used provided there are no contraindications. 6
A short course of oral corticosteroids (30–50 mg daily for 3–5 days with a taper over 1–2 weeks) is indicated for patients who develop a shoulder‑hand syndrome characterized by edema and trophic skin changes. 6

Botulinum toxin injection into the subscapularis and pectoralis muscles can be considered when shoulder pain is suspected to be related to spasticity. 6

In postmenopausal women, initiating estrogen therapy does not improve frozen‑shoulder symptoms and is contraindicated because randomized trials showed a significant increase in cardiovascular events that outweigh any potential musculoskeletal benefit. (American Heart Association) 8
Large hormone‑therapy trials (HERS and Women’s Health Initiative) were stopped early after demonstrating excess early cardiovascular risk following estrogen initiation, confirming that estrogen should not be used for secondary prevention of coronary events or for musculoskeletal conditions. (American Heart Association) 8

Musculoskeletal complaints, including frozen shoulder, are not listed among accepted indications for estrogen therapy in postmenopausal women; prescribing estrogen for these symptoms is discouraged due to the unfavorable risk‑benefit profile. (American Heart Association) 8

Acupuncture combined with a structured exercise program has been shown to produce a statistically significant reduction in musculoskeletal pain and functional limitation in patients with frozen shoulder. (American Society of Clinical Oncology) 9
Physical therapy that emphasizes stretching and targeted exercises (especially external rotation and abduction) is effective in improving shoulder mobility and reducing symptoms in frozen‑shoulder patients. (American Society of Clinical Oncology) 9

Women receiving aromatase‑inhibitor therapy for breast cancer experience a high prevalence (≈ 50 %) of musculoskeletal symptoms and frozen‑shoulder development, indicating the need for vigilant monitoring and early intervention. (American Society of Clinical Oncology) 9