What’s Actually Causing Your Shoulder Pain?
Below are the most common causes we see in clinic. If one of these sounds like you, we’ve linked through to a deeper dive where we’ve already written about it.
Rotator Cuff & Subacromial Pain (By Far the Most Common)
This group — rotator cuff tendinopathy, impingement, tears, and bursitis — accounts for roughly two-thirds of all shoulder pain presentations. It typically shows up as pain with overhead movement, weakness reaching up or behind your back, and that classic ache lying on the affected side at night.
The good news: a rotator cuff tear on a scan doesn’t automatically mean you need surgery. Plenty of people have rotator cuff changes on imaging with zero pain — imaging alone doesn’t tell the whole story. How your shoulder actually moves and performs matters more than what a picture shows.
Read more: Rotator Cuff Repair: A Physiotherapy Guide on Recovery and Rehabilitation · Rotator Cuff Tears — Do I Need Surgery?
Shoulder Instability
If your shoulder feels like it’s “slipping,” “popping out,” or genuinely unstable — rather than just painful — this points toward instability rather than a cuff problem. It’s common after a dislocation or in people with naturally more mobile joints, and needs a different rehab emphasis: control and stability, not just strength.
Read more: Shoulder Stabilisation and Bankart Repair: Your Path Back to Sport
Throwing & Overhead Sport Injuries
Swimmers, throwers, and overhead athletes load the shoulder differently to the rest of us, and the injuries that follow — and the rehab they need — are their own category. If you’re losing power or accuracy on your throw, or pain shows up specifically loading overhead, this is usually where to look.
Read more: Throwing Injuries · From Pitch to Pressing: Leading the Way in Shoulder Pain Recovery
Frozen Shoulder (Adhesive Capsulitis)
This one’s distinct: stiffness dominates over pain. Rather than pain with specific movements, you lose range of motion in most directions — reaching behind your back or overhead becomes genuinely difficult, not just uncomfortable. It’s more common in women, typically develops between 40–70, and is linked to diabetes and thyroid conditions. It tends to run its own course over months, and the right hands-on and exercise approach can make that course far more bearable.
AC Joint Pain
The acromioclavicular (AC) joint sits at the very top of the shoulder, where the collarbone meets the shoulder blade. Pain here is usually well localised to that spot and often follows a direct knock, a fall onto the shoulder, or heavy pushing/bench-press-type loading. It’s a much more targeted, easier problem to pinpoint on assessment than the cuff-related causes above.
Referred Pain from the Neck
Sometimes the shoulder isn’t the problem at all — the neck is. Pain, pins and needles, or numbness running from the neck down into the shoulder and arm often traces back to the cervical spine rather than the shoulder joint itself. If your shoulder pain came with neck stiffness or arm symptoms, this is worth ruling in or out early.
Read more: Pain in the Neck: Why Your Neck Hurts and What To Do About It
How We Diagnose It
Because these causes overlap in how they feel, an accurate diagnosis comes from a proper physical assessment — how your shoulder moves, where it’s weak, and what specifically reproduces your pain — not from an X-ray or MRI in isolation. Imaging has its place, but current best-practice guidelines are clear that treatment decisions should be based on what your shoulder can and can’t do functionally, not just what a scan shows.
Treatment: What Actually Works
Across the current research, one finding comes up again and again: targeted, shoulder-specific exercise therapy is the strongest evidence-based treatment for shoulder pain, and it holds up as well as — or better than — injections, manual therapy alone, or jumping straight to surgery for most presentations. A well-run exercise program, tailored to what your assessment finds, can provide meaningful pain relief that lasts well beyond the treatment period itself.
That doesn’t mean hands-on treatment has no role — manual therapy alongside exercise can help in the short term, particularly for stiffness-dominant presentations like frozen shoulder. But exercise is the cornerstone, not the afterthought.
What this looks like in practice:
- A thorough assessment to identify which of the causes above best fits your presentation
- A program targeting the right muscles for your specific problem (cuff-focused, scapular control, or general mobility, depending on diagnosis)
- Gradual, progressive loading — building capacity rather than just chasing pain relief
- A realistic timeline: most people see genuine improvement within 6–12 weeks of consistent work
Sport-Specific and Injury-Specific Rehab
If you already know your specific injury or you’re working toward getting back to sport, these go deeper on rehab and return-to-play:
Get It Properly Assessed
Whether your symptoms are from wear and tear or an acute injury from sport, work, or everyday life, we’re here to help. The shoulder needs to be both strong and mobile — if yours isn’t, get in touch today on (07) 3102 3337 or book online.
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