Shoulder Impingement: What It Means and What's Actually Going On
- staystrongtherapy
- Jun 30
- 6 min read
All information in this blog is supported by peer-reviewed research. Reference numbers appear throughout, with the full list at the bottom of the page. This blog ties closely into our rotator cuff-related shoulder pain blog, well worth reading alongside this one for the fuller picture.
You've Been Told You Have "Shoulder Impingement"
This is genuinely one of the most common diagnoses given for shoulder pain, and if it's what you've been told, you're far from alone. The term describes pain caused by the rotator cuff tendons being compressed, or "impinged," beneath the bony arch of the shoulder, the acromion, during arm movement, particularly overhead reaching.
It's a useful, widely understood term, and we'll explain exactly what it means and how it's typically diagnosed below. But it's also worth knowing upfront that the thinking behind this diagnosis has shifted considerably in recent years, and understanding that shift genuinely changes how the condition is best treated.
What Does "Impingement" Actually Mean?
Shoulder impingement syndrome describes compression of subacromial structures, including the rotator cuff, with recent evidence suggesting it arises from primary rotator cuff pathology and may relate to the rotator cuff's reduced ability to prevent the upper arm bone migrating upward during shoulder elevation. ¹ In simpler terms, as you lift your arm, the space beneath the acromion narrows, and if the rotator cuff isn't controlling the shoulder joint well, the tendons and the bursa (a small fluid-filled cushion) can become compressed and irritated in that space.
Typical symptoms include:
Pain at the front or outer side of the shoulder, often spreading down the upper arm
Pain specifically with overhead movements, such as reaching into a cupboard, getting dressed, or reaching behind
A noticeable "painful arc," pain that appears partway through lifting the arm and eases again near the top
Weakness or discomfort with resisted shoulder movements
Night pain, particularly when lying on the affected side
How Is It Diagnosed?
Clinicians typically use a cluster of hands-on tests rather than relying on any single one. A systematic review and meta-analysis found Neer's sign had a pooled sensitivity of 78% and specificity of 58%, while the Hawkins-Kennedy test had a pooled sensitivity of 74% and specificity of 57%. ² Research evaluating these tests in combination found that pairing the Hawkins-Kennedy sign, the painful arc sign, and a test of the infraspinatus muscle gave the best post-test probability, around 95%, for identifying rotator cuff disease at any degree of severity. ³
What this tells us is genuinely important: no single test reliably confirms or rules out the condition on its own, and using a combination of tests, alongside clinical judgement, gives a far more accurate picture than any single test in isolation. ²
So Why Has the Thinking Changed?
This is the part worth taking the time to understand properly, because it genuinely affects how impingement is best treated, not just what it's called.
As we cover in detail in our rotator cuff-related shoulder pain blog, modern research has found that the original mechanical explanation, bone simply pinching the tendon, doesn't hold up as well as once thought. Multiple high-quality trials have found that surgery to create more space beneath the acromion (subacromial decompression) performs no better than placebo surgery. Studies measuring the actual space beneath the acromion have found no meaningful difference between people with shoulder pain and those without. And mechanical factors like acromial shape and a narrowed subacromial space have not been shown to directly explain the pain.
This is why many specialists and researchers now prefer the broader term rotator cuff-related shoulder pain, recognising that the pain you're experiencing is more accurately explained by how the rotator cuff tendon has been loaded and how it's functioning, rather than simple bone-on-tendon pinching.
The practical takeaway: if you've been told you have "shoulder impingement," this is still a perfectly reasonable and recognisable starting point, but it shouldn't lead automatically to thinking surgery to "create more space" is the answer. The evidence strongly favours a different approach, covered below.
What to Look Out For
The vast majority of shoulder impingement-type pain is benign and responds well to conservative treatment. Please seek prompt medical assessment if you experience:
Sudden, significant weakness or inability to move the shoulder
A visible deformity following injury
Fever, chills, or feeling generally unwell alongside shoulder pain
Symptoms suggesting a cardiac or visceral problem, such as chest pain or pressure
Unexplained weight loss alongside persistent shoulder pain
Significant pain following major trauma
Myths vs Facts
"I need surgery to create more space in my shoulder.": High-quality research has found subacromial decompression surgery offers no greater benefit than placebo surgery. Conservative, exercise-based treatment is the recommended first-line approach for the vast majority of people.
"A scan will tell me exactly what's wrong.": Imaging frequently shows changes, such as bone spurs or a narrowed subacromial space, that are just as common in people without any shoulder pain at all. A thorough clinical assessment is generally more useful than imaging alone.
"My bones are pinching my tendon, so I need to avoid using my shoulder.": Avoiding movement tends to make things worse, not better. Current understanding points toward the tendon needing graded, progressive loading to recover its capacity, not rest and avoidance.
"Impingement is a completely different condition to rotator cuff pain.": Not really, modern understanding treats them as part of the same broad spectrum, which is why we now use the term rotator cuff-related shoulder pain to capture this more accurately.
How We Can Help
Treatment for shoulder impingement, in line with current evidence, follows the same approach as outlined in our rotator cuff-related shoulder pain blog.
Osteopathic manual techniques and manual therapy: used to address restriction in the shoulder, neck, and thoracic spine, and to complement an active exercise programme rather than replace it.
Deep tissue and sports massage: targeted soft tissue work to reduce compensatory tension around the shoulder girdle that often builds up as the body adapts to painful movement.
Medical acupuncture: used as part of a broader treatment plan to support pain management alongside exercise.
Exercise and Rehabilitation
Exercise is the foundation of recovery, with the same evidence-based principles covered in our rotator cuff-related shoulder pain blog applying directly here.
Scapular and motor control exercise, retraining how the shoulder blade and surrounding muscles work together, has good supporting evidence for reducing pain and disability over time.
Progressive strengthening of the rotator cuff helps the shoulder better control the position of the upper arm bone during overhead movement, addressing the underlying mechanism more directly than simply trying to create more physical space.
Thoracic mobility work, given the genuine link between neck, mid-back, and shoulder function covered in our other blogs.
Graded return to overhead activity, working through a structured, progressive programme rather than avoiding the movements that provoke symptoms entirely.
Your practitioner will guide a programme tailored to your specific presentation, building loading capacity gradually rather than chasing short-term symptom relief alone.
What to Expect at Your First Appointment
We will take a thorough history and carry out a hands-on assessment using a cluster of clinical tests rather than relying on any single test, alongside an assessment of your neck and thoracic spine. We will explain clearly what we find, using current, evidence-based language, and build a progressive treatment plan focused on restoring strength and movement, not avoidance.
Frequently Asked Questions
Is "shoulder impingement" the wrong diagnosis then? Not wrong exactly, just an older term that doesn't fully capture current understanding. Many practitioners now use the broader term rotator cuff-related shoulder pain, but "impingement" remains a widely used and recognisable description of the symptom pattern.
Do I need a scan? Usually not. Imaging frequently shows findings present in pain-free people too, and rarely changes the recommended treatment approach.
Will I need surgery? Most people don't. Strong evidence shows surgery offers no greater benefit than structured conservative treatment for the vast majority of cases.
How long will it take to improve? This varies, but consistent, progressive exercise over several weeks to a few months is generally what produces lasting improvement, rather than any single quick fix.
Been told you have shoulder impingement? Get in touch using the contact form and we will carry out a thorough, modern assessment and build the right treatment plan for you.
References
The Neer sign and Hawkins-Kennedy test for shoulder impingement. ResearchGate. Available at: https://www.researchgate.net/publication/51809902
Diagnostic accuracy of clinical tests for subacromial impingement syndrome: a systematic review and meta-analysis. Database of Abstracts of Reviews of Effects (DARE), NCBI Bookshelf. Available at: https://www.ncbi.nlm.nih.gov/books/NBK91532/
Diagnostic accuracy of clinical tests for the different degrees of subacromial impingement syndrome. PubMed. Available at: https://pubmed.ncbi.nlm.nih.gov/15995110/
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