Understanding Shoulder Subluxation: Physio Insights Diagnosis & Treatment

What Is A Shoulder Subluxation?

A shoulder subluxation refers to a partial dislocation of the glenohumeral joint. This is where the head of the humerus does not completely leave the socket but shifts out of its “normal” position. Unlike a complete shoulder dislocation, the joint remains partially in contact during a subluxation. This condition often results in acute shoulder pain, short and long term instability, with a risk of recurrent episodes in some situations.

Common causes include:

• trauma, and previous trauma
• repetitive overhead activity
• ligament laxity and hypermobility syndromes
• and certain neurological or musculoskeletal conditions. 

How Can You Tell If You Suffered a Shoulder Subluxation?

Recognising a shoulder subluxation can be challenging for both individual and medial practitioner. Especially since it may reduce spontaneously. Common signs and symptoms include:

• The feeling that the shoulder “slipped out” or moved abnormally
• Clicking, clunking, or popping sounds and sensations during the offending movement. 

More chronically individuals may experience:

• Sharp pain or aching in the shoulder, particularly with overhead or reaching actions
• A sense of looseness or instability in the shoulder
• A sense of weakness or reduced strength in the affected arm

In many cases, shoulder subluxation is confirmed through the subjective reporting of a feeling that the shoulder “moved” combined with clinical assessment. Imaging, such as X-ray, ultrasound, or MRI is sometimes used and may highlight associated trauma to structures in the shoulder consistent with a subluxation / dislocation injury. 

What Does a Subluxing Shoulder Feel Like?

As eluded to above, a subluxing shoulder typically presents as a sudden shift or slipping sensation in the joint, typically associated with pain. Following which there may be inflammatory aching and the presence of protective muscle guarding around the shoulder. This instability episode may occur with either minimal or significant force depending on individual anatomy. And can lead to a feeling of apprehension or anxiety associated with certain motions after the trauma. Chronically individuals may describe it as their shoulder “giving way” during specific movements, such as reaching actions behind them or overhead.  

How Do You Fix a Shoulder Subluxation?

The treatment of shoulder subluxation depends on its severity, frequency, and underlying causes. Shoulder subluxation physio is typically the first line of management and aims to improve joint stability, strength, and proprioception. Treatment strategies may include:

• Manual therapy: As appropriate to assist in pain management and restoration of normal movement around the shoulder. 
• Stability exercises: These focus particularly on strengthening the rotator cuff and scapular stabilisers to improve overall shoulder control.
• Postural re-education: Addressing thoracic spine movement and posture as well as scapular positioning to improve shoulder mechanics.
• Neuromuscular retraining: Enhancing proprioception and movement coordination to help prevent recurrence.

In cases where conservative management fails, especially where there is recurrent instability. Or when the individual is involved in high risk sports such as water sports where suffering a subluxation or dislocation may prove disastrous. Surgical stabilisation may be recommended. However, it is important to note that many patients respond very well to a structured physiotherapy program.

How Long Does a Shoulder Subluxation Take to Recover?

Time frames following a shoulder subluxation to return to normal activity levels varies widely. Depending on the individual, the severity of the injury, individual anatomy and circumstances, adherence to treatment and future intended demands on the shoulder.

For a first-time traumatic subluxation, healing may take in the vicinity of 4-12 weeks to return to pre-injury levels of activity. Chronic instability or repeated subluxations may require a longer rehabilitation period for satisfactory outcomes, often extending over several months of focused rehabilitation exercises.

Return to sport or full activity is usually guided by symptom resolution, the restoration of full range of motion, and the acquisition of appropriate strength and stability for desired tasks. Early intervention with physiotherapy can significantly shorten recovery time and ideally reduces the risk of long-term instability or recurrence.

Physiotherapy Treatment 

Shoulder subluxation physio treatment begins with a comprehensive assessment. A physiotherapist will generally look to evaluate and address:

• Shoulder alignment and joint mechanics
• Rotator cuff and scapular muscle strength
• Range of motion and evidence of isolated or global joint laxity
• Performance of functional tasks and movement control

Shoulder Subluxation vs. Shoulder Dislocation

While both conditions involve joint instability, a shoulder dislocation is more severe. Dislocation is where the humeral head fully displaced from the socket and can occur in multiple directions. Around 90% of the time the injury sustained is an anterior dislocation where the humeral head is displaced in and anterior (forward) direction. Dislocations typically require manual reduction and result in more significant damage to the joint capsule, labrum, surrounding ligaments and bony structures than subluxations. 

A subluxation often reduces spontaneously or with minimal manipulation. However it is worth noting that both conditions can lead to recurrent instability and should be managed appropriate with this in mind. Physiotherapy plays a key role in restoring strength control and function following either injury.

Can You Prevent Having Subsequent Shoulder Subluxation Episodes?

Preventing future subluxations involves strengthening the stabilising structures of the shoulder and addressing biomechanical risk factors. Regular conditioning, especially for overhead athletes or individuals with joint hypermobility, is crucial. A physiotherapist can design a personalised maintenance program to ensure shoulder health and reduce recurrence.

In some cases, taping or bracing may be used during high-risk activities to support the joint. This may be in the short term and in some circumstances long term in particularly high risk individuals or sports. Long-term reliance on external support is typically discouraged in favour of muscular control and proprioception training. However there are certainly situations where long term taping or supports to reduce the risk of subsequent episodes makes more sense than not using external supports. 

When to Seek Out Professional Assistance? 

If you suspect a shoulder subluxation, early intervention is key. Left untreated, it may lead to chronic instability or a failure to restore pre-injury functional levels. I would suggest always seek the opinion of an experienced shoulder physio. At Sydney Physio Clinic, we offer tailored programs for shoulder pain and instability. Working with them to help gain a return to activity with confidence and control.

If you’re experiencing shoulder instability or have recently suffered a subluxation, consider consulting a physiotherapist to start your recovery journey. Early, structured care is the best defence against ongoing shoulder dysfunction.