Shoulder pain is one of the most common musculoskeletal problems. What many people still call ‘shoulder impingement’ is now more accurately described as rotator cuff-related shoulder pain or subacromial pain syndrome. Those names simply mean pain coming from the tissues under the bony ‘roof’ of your shoulder (the acromion) – typically the rotator cuff tendons and the subacromial bursa. The good news: most people improve with the right advice and a targeted exercise plan.
What is shoulder impingement?
When you lift your arm, the rotator cuff and bursa glide in a narrow space beneath the acromion. With irritability or overload, these tissues become sensitive and painful – especially with overhead use, reaching out to the side, fastening a seatbelt or bra strap, or lying on the shoulder at night. You might notice a ‘painful arc’ between roughly 60-120° of arm elevation and local tenderness over the outer shoulder. Special tests (e.g., Hawkins-Kennedy, Neer) can reproduce pain, but by themselves they don’t pinpoint a single structure – which is why a thorough clinical assessment matters more than any one test.
How common is it?
In the general population, shoulder pain affects a median of ~16% of people at any time (studies range widely by methods and country). In primary care, around 2-3% of adults consult each year for shoulder pain. Subacromial/rotator-cuff problems are the most frequent cause.
Why it happens?
Rotator cuff-related shoulder pain is multifactorial – and is not usually caused by a single ‘impingement’ event.
Intrinsic (tissue) factors
- Temporary overload or deconditioning of the rotator cuff and scapular muscles
- Age-related tendon changes (common and often asymptomatic)
- Bursal irritation/inflammation during flare-ups
Extrinsic (movement/environment) factors
- Repeated or unaccustomed overhead activity (DIY, sport, work)
- Suboptimal scapula control or posture under load (often modifiable with exercise)
- Less commonly, structural narrowing (e.g., bony spurs) that may contribute but is rarely the sole driver of pain
Importantly, imaging often shows ‘abnormalities’ even in people without pain, so scans must be interpreted in context.
Who is at risk?
- Adults 35-65 are most typically affected
- People who’ve suddenly increased shoulder loading (new gym program, painting a ceiling, seasonal sport)
- Occupations or sports with frequent overhead use (e.g., painters, swimmers, throwers)
- Health factors like diabetes or smoking are associated with tendon problems more broadly, and poor sleep can amplify pain sensitivity. (Multiple guidelines group these within general rotator cuff disorder risk profiles)
Symptoms
- Aching over the outer shoulder/upper arm, sometimes spreading down the arm or up towards the neck
- Worse with reaching overhead, out to the side, or behind the back
- Night pain or difficulty lying on that side
- Painful arc on lifting the arm; strength may feel reduced due to pain inhibition
- Shoulder usually moves fully when the muscles are relaxed (passive range often near normal)
Red flags (rare): a hot, swollen joint, fever/unwell, trauma with inability to lift the arm, unexplained weight loss, or chest/neck-related pain. These need urgent medical assessment.
Do I need a scan?
Usually no at first. Most cases improve with conservative care. Imaging (ultrasound or MRI) is considered if:
- Symptoms don’t improve after a good trial of guided rehab,
- A full-thickness tear is suspected after trauma, or
- There are red flags or another diagnosis to rule out.
What treatments work?
- Education, activity modification and pain relief
- Keep the shoulder moving, but temporarily reduce or pace the painful overhead/load tasks
- Short courses of simple analgesia or NSAIDs (if safe for you) can help during a flare-up
- Targeted exercise (first-line care)
A progressive programme that blends:- Rotator cuff strengthening (isometric → isotonic → functional loading)
- Scapular control (serratus anterior, lower trapezius)
- Range-of-motion and gradual overhead exposure
- Posture and work/sport technique tweaks
High-quality guidelines and trials consistently recommend exercise-led rehabilitation as the mainstay of treatment. Specific “magic” exercises haven’t outperformed good general strengthening; what matters is progressive, patient-specific loading and adherence.
- Manual therapy (as an adjunct)
Hands-on techniques can reduce pain in the short term for some people and may help tolerance to exercise, but exercise alone performs just as well on average in the longer term. We use manual therapy selectively to support your plan, not as a stand-alone fix. - Corticosteroid injection (if pain is blocking rehab)
A subacromial steroid injection can provide short-term pain relief (weeks), which may help you engage in exercise – but it doesn’t improve outcomes in the medium to long term on its own. We consider it for severe night pain or when progress stalls, and always alongside a rehab plan. - Shockwave therapy (specific cases)
Extracorporeal shockwave therapy is supported for calcific tendinopathy of the rotator cuff (a subset where calcium deposits are present), with the best evidence for high-energy, image-guided treatment. Evidence for non-calcific rotator cuff-related shoulder pain is mixed. We reserve Extracorporeal shockwave therapy for appropriate presentations after assessment.
What about surgery?
Large, rigorous trials and international guidelines show that subacromial decompression surgery (acromioplasty) does not provide meaningful benefit over placebo (sham) surgery or well-delivered exercise therapy – even at 5-year follow-up. For the vast majority of people with rotator cuff-related shoulder pain, surgery is not recommended.
Surgery may still be considered for other shoulder problems (e.g., confirmed full-thickness rotator cuff tears with functional loss, instability, or advanced arthritis), but that’s a different pathway from typical “impingement‐type” pain. If your case isn’t improving, we’ll coordinate appropriate imaging and referral to discuss all options.
How our Physiotherapy team can help
At our clinic, you’ll get:
- Thorough assessment
We’ll identify your aggravating activities, test movement and strength, and screen for other causes. Labels like “impingement” can be scary; we translate the findings into a clear plan you can follow. - Personalised exercise plan
- Early pain-calmed movement and isometrics if needed
- Progressive rotator cuff & scapular strengthening (3-4 sessions/week)
- Graded return to overhead tasks/sport with load management
- Advice on sleep positions, desk setup, and pacing strategies
- Adjuncts as needed
Short-term manual therapy for pain relief; taping for comfort in early stages; discussion of medication options with your GP; and, where indicated, - Progress checks & progression
We’ll use outcome measures and strength tests to know when to progress – not just time alone. Most people see meaningful improvement within 4-12 weeks, though timelines vary by irritability, workload, and adherence.
If things aren’t improving
- Re-evaluate the diagnosis and plan: Are there barriers (sleep, stress, training spikes)? Are exercises dosed correctly?
- Consider imaging if persistent after a solid rehab trial or if trauma/tear is suspected.
- Discuss injection to settle pain if it’s blocking rehab (short-term aid).
- Calcific tendinopathy: consider Extracorporeal shockwave therapy or ultrasound-guided barbotage (needle lavage) via a shoulder specialist.
- Surgical opinions: reserved for specific pathologies (e.g., repairable full-thickness tears), not routine subacromial decompression for rotator cuff-related shoulder pain.
If you would like to speak to a physiotherapist then please get in touch. Book an appointment with a physio online.
