Shoulder dislocation occurs when the head of the humerus (upper arm bone) is forced out of the glenoid socket of the shoulder blade. The shoulder is the most mobile joint in the body, which also makes it the most commonly dislocated major joint. Dislocations can be extremely painful, limit arm function, and significantly increase the risk of future instability if not managed appropriately.
Most shoulder dislocations are anterior dislocations, where the arm bone moves forward out of the socket. Less commonly, the shoulder may dislocate posteriorly or inferiorly. A dislocation can occur due to trauma such as a fall, collision, or sporting tackle, but it may also happen with relatively low force in people who have underlying instability or connective tissue laxity.
Physiotherapy for shoulder dislocation plays a crucial role across all stages of care. Physiotherapists are involved in early assessment and referral, post-reduction rehabilitation, restoring strength and control, and reducing the risk of recurrent dislocation. High-quality shoulder dislocation rehab is essential for safe return to sport, work, and daily activities.
Key Facts
- The shoulder is the most frequently dislocated major joint, with anterior dislocations accounting for approximately 97% of cases. 🔗
- Young, active individuals have a high risk of recurrent shoulder dislocation following a first-time traumatic event, particularly those under 25 years of age. 🔗
- Shoulder dislocations are most common in men aged 16–20, often due to sport, and are also seen frequently in women aged 61–70, typically after a fall. 🔗
- The most common first-line treatment for a shoulder dislocation is non-surgical care, usually using a sling for up to two weeks for comfort and to allow healing. 🔗
Risk Factors
- Contact and collision sports such as rugby, AFL, football, and hockey.
- Falls, particularly onto an outstretched arm.
- Previous shoulder dislocation or instability.
- Younger age, especially under 25 years.
- Generalised joint hypermobility or connective tissue disorders.
- Poor shoulder strength or neuromuscular control.
Symptoms
- Sudden, severe shoulder pain at the time of injury.
- Visible deformity or change in shoulder contour.
- Inability or reluctance to move the arm.
- A feeling that the shoulder has “popped out” or is unstable.
- Swelling and bruising around the shoulder and upper arm.
- Numbness or tingling down the arm (possible nerve involvement).
Aggravating Factors
- Movement of the arm away from the body, particularly combined abduction and external rotation.
- Attempting overhead or throwing movements.
- Contact or collision during sport.
- Sudden pulling forces on the arm.
- Falls onto an outstretched arm or shoulder.
Causes
Shoulder dislocation occurs when the stabilising structures of the shoulder are overwhelmed by force. These stabilisers include the joint capsule, ligaments, labrum, rotator cuff muscles, and surrounding neuromuscular control systems.
In a typical traumatic anterior dislocation, the arm is forced into abduction and external rotation, levering the humeral head out of the front of the socket. This often damages the anterior labrum (Bankart lesion) and may create a compression injury to the humeral head (Hill-Sachs lesion).
Posterior dislocations are much less common and often occur following seizures, electrical injuries, or high-energy trauma. Inferior dislocations are rare and usually result from severe trauma with the arm forced overhead.
Once a shoulder has dislocated, the risk of recurrence increases, particularly in younger individuals and athletes. This is why physiotherapy for shoulder dislocation focuses not only on symptom recovery but also on restoring stability and movement control to reduce future episodes.
How Is It Diagnosed?
Diagnosis of shoulder dislocation is based on the mechanism of injury, clinical presentation, and imaging. In acute cases, the diagnosis is often obvious due to pain, deformity, and loss of movement.
After reduction, or in cases of recurrent instability, physiotherapists assess shoulder range of motion, strength, control, and apprehension. Special tests may be used to assess instability patterns, but these are performed cautiously.
Physiotherapists also screen for associated injuries, including rotator cuff tears, labral injuries, and nerve involvement. Early identification of these issues helps guide appropriate referral and rehabilitation planning.
Investigations & Imaging
- X-ray
- Used to confirm dislocation, assess direction, and identify associated fractures before and after reduction.
- MRI
- Used to assess soft tissue injuries such as labral tears, rotator cuff injuries, and capsular damage, particularly in younger or athletic patients.
- CT scan
- Provides detailed bony assessment when fractures or significant bone loss are suspected.
Grading / Classification
- Anterior shoulder dislocation
- The humeral head dislocates forward out of the socket. This accounts for the vast majority of shoulder dislocations.
- Posterior shoulder dislocation
- The humeral head dislocates backward. Often associated with seizures, electrical injuries, or high-energy trauma.
- Inferior shoulder dislocation (luxatio erecta)
- A rare and severe dislocation where the arm is forced overhead and the humeral head dislocates downward.
- Recurrent shoulder dislocation
- Repeated dislocations due to instability, often following an initial traumatic event, especially in younger individuals.
Physiotherapy Management
Physiotherapy for shoulder dislocation is essential to restore safe movement, rebuild strength, and reduce the risk of recurrence. Rehabilitation is guided by whether the dislocation was managed surgically or non-surgically, the presence of associated injuries, and the individual’s goals.
Early physiotherapy focuses on pain control, restoring movement safely, and preventing stiffness. As healing progresses, rehab shifts toward strengthening the rotator cuff, scapular muscles, and improving neuromuscular control of the shoulder in functional positions.
Exercise
Physiotherapy exercises progress through phases. Early exercises focus on gentle range of motion and muscle activation within safe limits. Strengthening then targets the rotator cuff, scapular stabilisers, and kinetic chain.
Advanced exercises include overhead control, plyometric tasks, and sport-specific drills to prepare the shoulder for high-demand activities.
Activity Modification
Activity modification is important early to protect healing tissues. This may include avoiding overhead movements, contact sport, and heavy lifting.
Physiotherapists guide a graded return to work and sport based on strength, control, and confidence rather than time alone.
Manual Therapy
Manual therapy may be used to address stiffness and restore normal shoulder mechanics once acute pain has settled.
Heat & Ice
Ice can assist with pain and swelling early, while heat may be useful for stiffness later in rehab.
Education
Education is critical to help patients understand recurrence risk, safe movement patterns, and the importance of completing a full rehabilitation program.
Other
Other strategies may include taping, bracing during early return to sport, and coordination with coaches or employers.
Other Treatments
Other treatments may include short-term immobilisation, pain relief prescribed by a doctor, and imaging-guided follow-up when required.
Surgery
Surgery may be considered in cases of recurrent dislocation, significant structural damage, or high-risk athletes. Common procedures include labral repair and capsular stabilisation.
Physiotherapy remains essential after surgery to restore strength, movement, and confidence.
Prognosis & Return to Activity
The prognosis after shoulder dislocation varies. First-time dislocations in older adults often recover well with physiotherapy alone. Younger individuals and athletes have a higher risk of recurrence, particularly without structured rehabilitation.
With high-quality shoulder dislocation rehab, many people return to full activity and sport, although timelines vary based on injury severity and demands.
Complications
- Recurrent shoulder instability or repeated dislocations.
- Chronic pain or apprehension with overhead movement.
- Associated rotator cuff or labral injury.
Preventing Recurrence
- Complete a full physiotherapy program after dislocation, even if pain settles early.
- Maintain shoulder and scapular strength, particularly in overhead and contact sports.
- Gradually return to high-risk activities rather than rushing back.
When to See a Physio
- You have had a shoulder dislocation and want to reduce recurrence risk.
- Your shoulder feels unstable or painful after reduction.
- You want guidance on returning to sport or work safely.