Shoulder pain generates more confusing diagnostic labels than almost any other area of the body. People arrive having been told they have impingement, or bursitis, or a tear- sometimes all three about the same shoulder from different practitioners within a month.
Those labels sound like separate conditions requiring separate treatments. In current practice, most of them are grouped together, because the distinction between them rarely changes what actually helps. Here is what each one means and why the grouping happened.
Impingement
For decades the standard explanation was mechanical. The tendon was being pinched under a bony arch, so the logical treatment was to surgically make more room.
That model did not survive testing. When arthroscopic subacromial decompression was compared against placebo surgery in a randomised trial, the extra benefit of removing the bone was not what the theory predicted. Long-term follow-up of exercise trials has since found that people who respond to a specific exercise program do not go on to need the operation.
The term has largely been retired. Most clinicians now use rotator cuff-related shoulder pain, which is deliberately broader and does not commit to a mechanism that the evidence does not support.
Bursitis
A bursa is a fluid-filled sac that reduces friction, and it can certainly become irritated. The difficulty is that bursal changes show up readily on imaging in shoulders that feel completely fine, so seeing it on a report does not establish that it is the source of your symptoms.
Bursitis is best understood as one finding within an irritable shoulder rather than a standalone diagnosis. Treating it as separate tends to lead people toward repeated injections rather than toward loading the shoulder back to capacity.
A tear on a scan
This is the label that frightens people most, and it deserves the most context.
Rotator cuff tears become steadily more common with age in people who have no shoulder symptoms whatsoever. Pooled prevalence data shows the rate climbing decade by decade in shoulders that work perfectly well. A tear found on your scan may be the cause of your pain, or it may have been there for years, quietly, like grey hair.
Tears also come in degrees. Partial thickness tears sit within the same rotator cuff-related shoulder pain umbrella as tendinopathy and are managed the same way. Many full-thickness degenerative tears are also managed without surgery, successfully. The tear itself is not the decision point. What your shoulder can do, and what it needs to do, is the decision point.
Traumatic tears in younger people after a genuine injury are a different conversation, which is exactly why individual assessment matters more than a report.
Frozen shoulder is genuinely different
This one is worth separating out, because the management and the timeline are not the same. Frozen shoulder involves progressive loss of passive range, meaning the shoulder will not move even when someone else moves it for you. It follows recognisable stages and typically resolves over a much longer period.
If movement is severely restricted in every direction rather than painful in specific ones, this is a different problem, and it needs to be identified early. For very irritable shoulders in the painful stage, warm water exercise is often far better tolerated than land-based work.
What the evidence supports
An umbrella review of conservative treatment for subacromial shoulder pain produced a strong recommendation for exercise therapy as first-line care to improve pain, mobility and function. Not exercise as an adjunct to something else. Exercise as the primary treatment.
The practical version looks like progressive loading of the rotator cuff and the muscles controlling the shoulder blade, at an intensity that challenges the tissue without flaring it for days. Hands-on treatment and other components from the range of services available can make the exercise more tolerable, particularly early, but they support the loading rather than replace it.
Getting the dose right is the hard part, and it is why supervision helps. Too little and nothing changes. Too much and you spend a fortnight backing off. One-on-one exercise sessions allow the progression to be adjusted against how the shoulder actually responded rather than against a generic timetable.
The timeline people are not warned about
Shoulders are slow. Tendon adapts more gradually than muscle, and meaningful change is measured in months rather than weeks.
A reasonable expectation is some improvement in irritability within a few weeks, and substantial functional change over roughly three months of consistent loading. People who abandon a program at week four have usually stopped before the tissue had a chance to respond, which then becomes evidence in their mind that exercise did not work.
Shoulder pain is among the most common musculoskeletal conditions seen in practice, and the pattern of people stopping too early is one of the most common reasons it becomes chronic.
Frequently asked questions
There is a tear on my scan. Does that mean I need surgery?
Not automatically, and for degenerative tears often not at all. Surgical decisions are based on your symptoms, your function, the nature of the tear and your goals, rather than on the presence of a tear alone. A shoulder that is strengthening and doing what you need it to do is a good outcome, whatever the report says.
Why is it so much worse at night?
Night pain is characteristic of an irritable shoulder and relates to the position you settle into rather than to damage occurring while you sleep. Many people get relief from a pillow supporting the arm in front of the body, and it is usually one of the earlier things to improve.
Should I rest it completely or keep using it?
Neither extreme. Complete rest tends to leave the shoulder stiffer and weaker without addressing the cause, and pushing through significant pain usually prolongs the irritability. The target is a modified middle ground where you keep moving within a tolerable range while loading is rebuilt.
How long before this settles?
Think months rather than weeks for a full recovery, with early changes in sleep and irritability arriving sooner. Anyone promising a quick resolution for a longstanding shoulder is not being straight with you.
Is a cortisone injection worth considering?
Injections can reduce pain in the short term, which sometimes creates a window to start exercising a shoulder that is too irritable to load. They do not appear to change the longer-term outcome on their own, and repeated injections carry their own considerations. It is a decision to make with your GP, ideally as part of a plan rather than instead of one.
Six months is not early days
Shoulders get waited out more than any other joint. It is not stopping you completely; you have adapted around it, and every month you assume it will probably sort itself out.
If you have been reaching with the other arm for half a year, the shoulder has told you what it is going to do on its own. Call 0428 187 899 or email info@imotionphysio.com.au to have it assessed properly, or book at imotionphysio.com.au. The clinic is at 116B Mt Dandenong Road, Ringwood East VIC 3135.