Shoulder Pain
Understanding Shoulder Pain —
Finding the Source
The shoulder is the most mobile joint in the body — and the most complex to diagnose. ROOT METHOD identifies whether your pain originates in the rotator cuff, glenohumeral joint, AC joint, or the cervical spine.
Clinical Overview
What is Shoulder Pain?
The shoulder complex involves four articulations — the glenohumeral, acromioclavicular, sternoclavicular, and scapulothoracic joints — all of which can independently produce pain. The rotator cuff, biceps tendon, joint capsule, subacromial bursa, and the cervical nerve roots can each generate shoulder pain with presentations that are clinically very similar. The shoulder is, in diagnostic terms, one of the most deceptive regions of the musculoskeletal system.
Without systematic examination, it is not possible to know which structure is at fault — and treating the wrong one produces no benefit regardless of the quality of the treatment. A patient treated for subacromial impingement whose pain is actually originating from the cervical C5 nerve root will not improve with rotator cuff rehabilitation. The intervention was not wrong; the target was.
ROOT METHOD's approach to shoulder pain is a systematic structure-by-structure examination that isolates each potential pain generator — rotator cuff tendons individually, the acromioclavicular joint, the glenohumeral joint capsule, the biceps tendon, and the cervical nerve roots — before any treatment decision is made. The specific structure identified as the primary pain source determines everything about the management approach.
Clinical Presentation
Common Symptoms of Shoulder Pain
Each symptom pattern carries diagnostic information about the likely structural source. Recognising the pattern is the first step toward the correct treatment.
Painful Arc
Pain specifically occurring between 60 and 120 degrees of shoulder elevation — characteristic of subacromial impingement. Pain above and below this arc is less; a finding that localises the problem to the subacromial space and implicates the rotator cuff or subacromial bursa as the pain generator.
Night Pain
Pain disturbing sleep when lying on the affected shoulder. Night pain is one of the most common and distressing features of rotator cuff pathology, particularly partial and full-thickness tears. Its presence is strongly associated with structural rotator cuff compromise rather than purely mechanical impingement.
Weakness
Difficulty lifting the arm, carrying weight, reaching overhead, or performing tasks behind the back. Weakness may be pain-limited or reflect true structural compromise of the rotator cuff. The specific pattern of directional weakness helps identify which tendon is involved.
Clicking or Catching
Mechanical sounds or sensations during shoulder movement, indicating labral pathology, biceps tendon subluxation, or subacromial tissue catching under the acromion. Clicking alone is not necessarily pathological — painful clicking with a consistent arc of movement is more clinically significant.
Radiating Arm Pain
Pain travelling into the arm or hand may indicate cervical involvement via nerve root referral, or biceps tendon pathology rather than intrinsic glenohumeral disease. Dermatomal distribution of the arm pain — rather than a vague diffuse ache — points strongly toward a cervical nerve root origin that must be excluded.
Stiffness
Global restriction of movement in all directions, particularly external rotation — the capsular pattern suggesting adhesive capsulitis (frozen shoulder) rather than a mechanical rotator cuff problem. Global restriction at end range of all movements is distinct from the painful arc pattern of subacromial impingement.
Clinical Aetiology
Common Causes of Shoulder Pain
Multiple structures — and the cervical spine — can independently produce shoulder pain. Systematic structure-by-structure examination is required to identify the primary source.
Rotator Cuff Pathology
Supraspinatus, infraspinatus, or subscapularis tendon tears or tendinopathy are the most common structural cause of shoulder pain in adults over 40. The specific tendon involved determines the pattern of weakness and the management approach. Each tendon is tested in isolation during the ROOT METHOD shoulder assessment.
Subacromial Impingement
Compression of the rotator cuff tendons and subacromial bursa between the humerus and acromion during arm elevation, producing pain in the painful arc range. Impingement is a mechanism, not a complete diagnosis — the underlying cause (tendon tear, bursitis, acromial morphology) must be identified for effective management.
AC Joint Arthritis
Acromioclavicular joint degeneration produces pain at the superior aspect of the shoulder, worse with horizontal adduction and cross-body movements. AC joint pain is often missed when examination focuses only on the rotator cuff — targeted AC joint stress testing is a mandatory component of every shoulder assessment.
Glenohumeral Osteoarthritis
Progressive degeneration of the glenohumeral joint cartilage, producing deep joint pain, global restriction of movement, and crepitus on rotation. Most common in patients over 60. Distinguished from frozen shoulder by age of onset, the presence of crepitus, and the pattern of restriction on examination.
Biceps Tendinopathy
Inflammation or degeneration of the long head of biceps tendon within the bicipital groove produces anterior shoulder pain aggravated by overhead activity and resisted elbow flexion. Speed's and Yergason's tests isolate the biceps tendon and distinguish its involvement from rotator cuff pathology during assessment.
Cervical Referral
C4 and C5 nerve root pathology referring pain to the deltoid region and lateral arm without any rotator cuff involvement. This is frequently misdiagnosed as shoulder pathology when the true origin is cervical. Cervical screening including Spurling's test is a mandatory component of every shoulder assessment at ROOT METHOD.
Clinical Guidance
When to Seek Professional Assessment
Shoulder pain that persists beyond a few weeks — particularly with weakness or night pain — warrants systematic clinical assessment.
Book a Clinical Assessment If…
- Shoulder pain has persisted for more than 6 weeks without meaningful improvement
- You experience a painful arc — pain specifically when raising the arm between 60 and 120 degrees
- Weakness is affecting your ability to lift, reach overhead, or perform activities behind the back
- Night pain is disturbing your sleep when lying on the affected shoulder
- You have received treatment with no lasting improvement
- Pain radiates into the arm or hand alongside shoulder symptoms
Seek Emergency Care Immediately If…
- Acute severe shoulder pain with visible deformity following trauma — possible dislocation requiring same-day assessment and reduction
- Complete inability to raise the arm following a fall or direct impact — possible acute rotator cuff tear requiring urgent imaging
- Rapidly progressive arm weakness or hand numbness alongside shoulder pain — may indicate acute nerve compression
- Shoulder pain with systemic features — fever, unexplained weight loss, or severe unremitting pain at rest — require urgent medical review
The ROOT METHOD Difference
How ROOT METHOD Approaches Shoulder Pain
ROOT METHOD applies a systematic shoulder examination protocol that isolates every potential pain-generating structure before any treatment decision is made. The approach follows a hierarchy: first confirm whether the pain is coming from the shoulder itself or referred from the cervical spine, then isolate the specific shoulder structure responsible.
- Hawkins-Kennedy and Neer impingement tests to assess the subacromial space and rotator cuff mechanism
- Empty Can test (supraspinatus), External Rotation Lag Sign (infraspinatus), and Lift-Off test (subscapularis) — specific tendon isolation
- Speed's and Yergason's tests for biceps tendon, AC joint stress testing for acromioclavicular involvement
- Glenohumeral range of motion pattern analysis — capsular pattern identifies adhesive capsulitis
- Cervical screen including Spurling's test and C4–C5 dermatomal mapping to exclude nerve root referral as the primary pain source
Your First Visit
What to Expect During Your Shoulder Pain Assessment
A ROOT METHOD shoulder assessment systematically works through four stages to identify the specific structure driving your pain.
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Before You Arrive
Pre-Visit Intake
Shoulder pain history including mechanism of onset, symptom character (ache vs sharp vs electric vs catching), functional limitations by specific activity, prior imaging results, and previous treatment history. Understanding what has already been tried — and what effect it had — guides the assessment focus.
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Stage 1
Movement and Posture Assessment
Active and passive range of motion assessment in all planes, painful arc identification and characterisation, scapular mechanics assessment during arm elevation, thoracic kyphosis evaluation, and identification of which specific movements consistently reproduce the pain.
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Stage 2
Structure-by-Structure Examination
Specific rotator cuff tendon isolation tests for each of the four tendons; AC joint stress testing; biceps tendon provocation; glenohumeral joint capsular assessment; and a full cervical screen including Spurling's test, cervical range of motion, and C4–C5 dermatomal testing to exclude referred pain as the primary source.
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Stage 3
Diagnosis and Management Pathway
Identification of the specific structure responsible, clear determination of the appropriate management pathway — conservative rehabilitation, imaging for surgical assessment, or cervical treatment if referral is identified — and a structured treatment plan with measurable clinical benchmarks.
Common Questions
Questions About Shoulder Pain and ROOT METHOD
How do I know if my pain is from my rotator cuff or my neck?
The key differentiator is the distribution of pain and the clinical examination findings. Cervical nerve root involvement (typically C4 or C5) produces dermatomal arm pain — a specific pattern of numbness or electric pain following a defined path down the arm. Rotator cuff pathology produces isolated shoulder and upper arm pain without a clear dermatomal distribution.
Spurling's test — compressing the cervical spine in extension and lateral flexion toward the affected side — reproduces arm pain when the cervical nerve root is involved, and is negative in isolated rotator cuff pathology. Rotator cuff isolation tests will be positive in true rotator cuff disease and negative when pain is referred from the cervical spine. Both assessments are performed at every ROOT METHOD shoulder appointment.
Is surgery always needed for a rotator cuff tear?
No. The majority of rotator cuff tears — including partial-thickness tears and many full-thickness tears — respond well to appropriately targeted conservative management, including a structured progressive loading rehabilitation programme. The decision for surgery has specific indications: a complete tear with persistent significant weakness after an adequate conservative trial, an acute traumatic complete tear in a younger active patient, or structural failure that cannot be expected to respond to rehabilitation.
Many patients receive surgery prematurely because the conservative treatment they received was not targeted to their specific tear pattern. ROOT METHOD identifies the tear type and severity before determining the appropriate management pathway.
What does a painful arc mean?
Pain between 60 and 120 degrees of shoulder elevation indicates subacromial impingement — compression of the rotator cuff tendons under the acromion in the mid-range of movement. The subacromial space is narrowest at this arc, making the rotator cuff and bursa most vulnerable to compressive load during this phase of elevation. Pain above and below this arc is less severe, giving the characteristic arc pattern.
The painful arc is one of the most diagnostically useful findings in shoulder assessment, pointing specifically to the subacromial space. The underlying cause within that space — tendinopathy, partial tear, complete tear, or isolated bursitis — is then determined through specific rotator cuff testing.
Why does shoulder pain hurt more at night?
Lying on the affected shoulder compresses the subacromial space and the involved tendons, increasing mechanical irritation of already compromised tissue. The lack of muscular support during sleep means the shoulder rests in positions that increase subacromial compression. Additionally, reduced daytime distraction removes the masking effect of activity on background pain levels.
Night pain is a consistent feature of rotator cuff tears and inflammatory conditions. Its presence is a clinical indicator pointing toward structural pathology rather than simple impingement.
What is impingement and what causes it?
Subacromial impingement is compression of the rotator cuff tendons and bursa between the humerus and the acromion during arm elevation. It is a mechanism, not a complete diagnosis. The factors that contribute to impingement include: rotator cuff weakness allowing the humeral head to migrate superiorly during elevation; acromial morphology (a hooked or curved acromion); subacromial bursal thickening; scapular dyskinesis reducing dynamic subacromial space; and rotator cuff tears allowing superior migration of the humeral head.
Effective management addresses the specific contributing factor — not just the impingement mechanism. This is why generic shoulder physiotherapy produces variable results when the underlying cause has not been identified.
Can shoulder pain come from the neck?
Yes — and this is one of the most frequently missed diagnoses in shoulder pain management. C4 and C5 nerve roots refer pain to the shoulder and upper arm in a pattern that can exactly mimic rotator cuff pathology. The patient experiences shoulder pain, often with some arm discomfort, and no rotator cuff test is dramatically abnormal — because the shoulder itself is not the source.
Cervical screening is a mandatory component of every shoulder assessment at ROOT METHOD. No shoulder diagnosis is finalised until the cervical spine has been systematically evaluated and excluded as a primary or contributing source of the pain.
Shoulder Pain Has a Source. We Find It.
The shoulder involves multiple structures — and the cervical spine — any of which can independently generate pain with similar presentations. ROOT METHOD identifies the exact structure before any treatment begins, so every intervention targets the actual problem.