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What do dislocation and instability mean?
The rounded head of the upper arm bone rests in a socket on the shoulder blade. The capsule, ligaments, cartilage rim called the labrum, and muscles work together to keep this joint stable. Mobility and stability need to work together during everyday movements.
In a dislocation, the head leaves the socket completely. A subluxation is a partial displacement. Instability means difficulty keeping the joint stable, with slipping sensations or repeated episodes. A very flexible shoulder is not necessarily unstable: symptoms and examination matter.
Understand the picture
Centred, partly displaced or dislocated
Centred joint
The head rests in its socket, supported by tissues and muscles.
Subluxation
Contact is partly lost.
Dislocation
The head leaves the socket completely: urgent assessment is needed.
What might you notice?
A dislocation after a fall can cause immediate pain, a changed shoulder shape and difficulty moving the arm. Numbness or weakness can accompany the injury. Some shoulders move back into place themselves, but associated damage may still require assessment.
Later, instability may cause apprehension in particular positions, giving way or a feeling that the arm is unsupported. Clicking alone does not establish a dislocation. Describe the sensation and circumstances without deliberately reproducing a slip to demonstrate it.
Why can it happen again?
An initial injury can stretch or tear the capsule, ligaments or labrum. Bone injuries can also occur. These changes may contribute to recurrence; age, sport and the demands placed on the arm also influence the discussion with a specialist.
Other people have naturally more flexible ligaments, sometimes in several joints. Muscle coordination and repeated loading can then be especially relevant. This is not managed in exactly the same way as a first traumatic dislocation. An online movement test cannot calculate your individual recurrence risk.
Chapter sources [1]
What does the medical assessment check?
After a suspected dislocation, clinicians check the joint position, circulation and nerve function. X-rays can identify an associated fracture. Reduction, meaning putting the joint back, is a medical procedure that may require pain relief and monitoring.
For persistent instability, the history of episodes and examination guide further tests. MRI can clarify soft-tissue damage; CT may help assess bone. The clinician selects imaging to answer a particular question, especially when considering surgery. More scans are not automatically more useful.
What should you do during a suspected dislocation?
Seek urgent assessment. Support the arm comfortably without pulling on it or forcing a movement. Do not ask someone to perform an internet reduction technique. Do not drive yourself with a seriously injured shoulder.
Call 112 in Luxembourg for a cold, pale or numb hand, a serious injury, or when you cannot reach care safely. An assessment is still needed after a traumatic episode that seems to have corrected itself, particularly with continuing pain or weakness.
How can physiotherapy help?
Once the injury has been assessed and protection instructions agreed, rehabilitation can gradually develop movement, strength and control. The aim is a shoulder that guides the arm during useful tasks. Positions associated with slipping are reintroduced carefully, when appropriate.
Instability without a major injury often needs a specific coordination programme. Routine stretching may be unsuitable for an already very flexible shoulder. Your physiotherapist considers the arm, trunk and actual tasks, then chooses manageable exercises. Strengthening is one part of this process, not a substitute for assessing associated injuries.
Chapter sources [1]
In everyday life
Returning to sport
Protect
Follow the limits agreed after assessment.
Control
Practise safe movements without slipping.
Prepare
Reintroduce sporting demands with your care team.
When is surgery discussed?
Repeated dislocations, particular bone or labral injuries, and sporting or occupational demands may justify specialist advice. In some circumstances this is useful after the first episode. Surgery is not inevitable for every feeling of instability.
Ask what the operation aims to stabilise, what restrictions follow and what risk of further dislocation remains. Discuss what targeted rehabilitation could offer without surgery as well. The decision depends on the complete assessment and your priorities, rather than the number of clicks or a single image.
Chapter sources [1]
Which exercises should wait?
Movement limits and sling duration after dislocation are individual. Do not start the general exercises on this site before checking your instructions. A movement allowed in daily life may still be unsuitable with speed or resistance.
Do not test whether the shoulder holds by forcing it into the position that caused the injury. Stop an exercise that produces slipping, marked apprehension or new tingling. The programme needs adjusting before more difficulty is added. Recent surgery adds its own restrictions.
When can work or sport resume?
Pain relief alone does not establish readiness. Movement control, permitted range, strength and absence of giving way also matter. Contact sport, throwing or overhead work places different demands on the shoulder from light tasks close to the body.
Recovery often takes weeks or months, and sometimes longer after surgery. Stages may include simple tasks, sport-specific movements without opposition and then greater demands. Someone else’s recovery date is not clearance for your own return.
How can future difficulties be addressed?
Keep exercises relevant to your activity and build up gradually after a break. Discuss temporarily risky positions while aiming for useful long-term movement. A clear progression can help confidence as well as physical ability.
Report each new episode and its context: a fall, contact, an ordinary movement or sleep. Recurrence despite a suitable programme calls for reassessment. Do not get used to putting a slipping shoulder back yourself: nerves, blood vessels and bone need protection.
Your questions
Can I put my shoulder back myself?
No. An attempted reduction can worsen a fracture or damage nerves or blood vessels. A suspected dislocation needs urgent medical assessment.
It went back by itself. Should I seek care?
Yes after a traumatic episode, especially with continuing pain, weakness or numbness. Returning to position does not rule out associated damage.
Does hypermobility mean I have a disease?
Not necessarily. Some people are naturally flexible without problems. Pain, repeated giving way or other difficulties are reasons to seek an assessment.
Chapter sources [1]
Is strengthening enough?
Strength can help, but movement control, associated injuries and activity demands matter too. Agree the loads and ranges with your clinician.
Chapter sources [1]
Sources and references
- [1] AAOS OrthoInfo · Chronic shoulder instability
- [2] AAOS OrthoInfo · Shoulder pain and common shoulder problems
- [3] NHS · Dislocated shoulder
- [4] AAOS OrthoInfo · Shoulder trauma: fractures and dislocations
- [5] CGDIS Luxembourg · 112
- [6] NHS · Shoulder pain
- [7] NHS · Heart attack
Text updated on
Medical review: awaiting Hasib Selimovic.