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What causes shoulder pain?

Shoulder pain is one of the most common musculoskeletal complaints in adults, affecting approximately 20–30% of the population at any given time. The shoulder is the most mobile joint in the body, which makes it inherently vulnerable to soft tissue injury.

Condition Typical presentation
Rotator cuff tear Pain on lifting the arm, weakness, often worse at night; may follow a specific injury or develop gradually
Rotator cuff tendinopathy Aching pain on overhead activity; no specific injury; often bilateral
Subacromial bursitis Pain on the outer aspect of the shoulder; painful arc between 60–120° of abduction
Biceps tendon pathology Pain in the front of the shoulder; may be associated with a "pop" or visible deformity (Popeye sign) if ruptured
Acromioclavicular joint (ACJ) pathology Pain at the top of the shoulder, over the ACJ; often follows a fall on the outstretched hand
Frozen shoulder (adhesive capsulitis) Gradual onset of stiffness and pain; loss of both active and passive range of movement; typically self-limiting over 18–24 months
Glenohumeral osteoarthritis Deep aching pain; loss of range of movement; typically in older adults

When does shoulder pain need a scan?

A shoulder ultrasound scan is appropriate when:

  • Shoulder pain has persisted for more than 4–6 weeks without improvement
  • There is weakness on lifting the arm (suggesting a rotator cuff tear)
  • There has been a specific injury (fall, sudden movement) followed by persistent pain
  • You are being considered for a corticosteroid injection — ultrasound guidance significantly improves accuracy
  • You have had a previous injection that did not provide relief — the injection may not have been accurately placed
  • Your GP or physiotherapist wants imaging to guide management

What does a shoulder ultrasound show?

A shoulder ultrasound at Sonoworld provides a dynamic, real-time assessment of the soft tissue structures of the shoulder, including:

  • Rotator cuff tendons (supraspinatus, infraspinatus, subscapularis, teres minor) — identifying tears (partial or full thickness), tendinopathy, and calcific deposits
  • Subacromial bursa — identifying bursitis (fluid distension) and impingement
  • Biceps tendon — identifying tendinopathy, tears, and subluxation
  • Acromioclavicular joint — identifying joint effusion and osteophytes
  • Glenohumeral joint — identifying joint effusion

The dynamic capability of ultrasound — the ability to image the shoulder in motion — is a significant advantage over MRI for assessing impingement and rotator cuff function.

Ultrasound vs MRI for shoulder pain

Factor Ultrasound MRI
Rotator cuff tears Excellent — sensitivity 87–96% for full-thickness tears Excellent — gold standard for labral and bone pathology
Dynamic assessment ✅ Yes — can assess impingement in real time ❌ No — static images only
Guided injection ✅ Yes — can guide injection in the same appointment ❌ No
Cost Lower Higher
Wait time at Sonoworld 24–48 hours Not available at Sonoworld
Labral tears Limited Gold standard

For most presentations of shoulder pain, ultrasound is the appropriate first-line investigation. MRI is reserved for cases where labral pathology, bone marrow oedema, or nerve compression is suspected.

From Our Practice

The most common scenario we see is a patient who has been told by their GP that they have "shoulder impingement" and has been referred for physiotherapy. After 6–8 weeks of physiotherapy without improvement, they come to us for a scan. In a significant proportion of these cases, the ultrasound identifies a partial or full-thickness rotator cuff tear — a finding that changes the management pathway entirely. Physiotherapy alone is not the appropriate treatment for a significant rotator cuff tear; the patient needs a surgical opinion. Early imaging avoids months of ineffective treatment.

Frequently asked questions

Is a shoulder ultrasound scan painful?

No. The scan is entirely painless. You will be asked to move your arm into various positions during the scan, which may cause some discomfort if your shoulder is already painful, but the ultrasound itself does not cause pain.

Do I need a GP referral?

No. You can book directly at Sonoworld without a GP referral.

Can I have an injection at the same appointment as my scan?

Ultrasound-guided injections are available at Sonoworld. The scan and injection can be performed in the same appointment. See our guide to ultrasound-guided injections for more information.

Sonoworld is registered with the Care Quality Commission (CQC). Our sonographers are registered with HCPC and are members of BMUS. All scans are performed at our Marylebone clinic: 29 Weymouth Street, London W1G 7DB.

Book Your Shoulder Ultrasound Scan at Sonoworld

Same-day and next-day appointments available at our Marylebone clinic. Instant verbal results. Written report within 24 hours. No GP referral required.

Price: £235

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Or call us on 020 7486 1991

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