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Shoulder Dislocation

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Shoulder Dislocation: Causes & Treatment in Singapore

A shoulder dislocation happens when the head of the upper arm bone (humeral head) comes out of the shoulder socket. It is the most commonly dislocated major joint because the shoulder is built for mobility, not just stability.

Effective shoulder dislocation treatment includes confirming the diagnosis, performing a safe reduction, assessing for associated injuries, and progressing through rehabilitation to restore function. 

shoulder dislocation anatomy illustrations

What is shoulder dislocation?

Most shoulder dislocations are anterior dislocations, where the shoulder dislocates forward. Symptoms often include a visibly deformed or “out of place” shoulder, swelling or bruising, severe pain, and difficulty moving the arm.

A dislocation can also cause associated injuries such as labrum tears (Bankart lesion), rotator cuff tears, or fractures, which is why proper assessment matters.

Common causes

A shoulder dislocation usually occurs after trauma, such as a fall, sports collision, or sudden forceful movement. It can also occur in people with shoulder instability, ligament laxity, or a history of previous dislocations.

Symptoms of shoulder dislocation

Common symptoms include:

  • Pain that is sudden and intense
  • A shoulder that looks visibly out of position
  • Inability to move the arm normally
  • Swelling or bruising
  • Numbness or tingling down the arm in some cases

If there is numbness in the hand or weakness that does not improve after the shoulder is back in place, seek urgent review to assess for nerve or vascular injury.

First aid and what to do immediately

If you suspect a shoulder dislocation, avoid forcing the shoulder back in yourself. Keep the arm supported, apply ice if available, and seek medical attention. The priority is safe reduction and checking for associated injuries.

Diagnosis

Assessment typically includes a history, physical examination, and imaging.

  • X rays are commonly performed before and after reduction to confirm alignment and check for fractures. 
  • MRI may be recommended if there is ongoing pain, weakness, repeated dislocations, or suspicion of labrum or rotator cuff injury.

A thorough diagnosis is an important part of shoulder dislocation treatment, especially for athletes and people who have recurrent instability.

Shoulder dislocation treatment

1) Reduction

The first step in shoulder dislocation treatment is reduction, which is the process of restoring the joint back to its normal position. Pain often improves significantly once the shoulder is reduced.

Reduction should be performed by a trained medical professional, sometimes with sedation or pain relief depending on the situation.

2) Immobilisation

After reduction, a sling is commonly used for comfort and to protect the shoulder in the early phase.

The duration varies depending on age, activity level, and associated injuries, and it should be guided by clinical review rather than a fixed rule.

3) Rehabilitation and physiotherapy

Rehabilitation is the most important part of long-term recovery. The goals are to restore range of motion, strengthen the rotator cuff and shoulder blade stabilisers, and improve control to reduce the risk of recurrence.

In many cases, physiotherapy and a guided home programme are enough. The important part is follow-up and rehabilitation after reduction, because that is what rebuilds stability and helps prevent recurrence.

4) Medication and pain control

Applying ice for the first one to two days can help reduce pain and swelling.

Pain relief and anti-inflammatory medication may be used when appropriate, especially to allow comfortable sleep and participation in exercises.

When is surgery considered?

Many first-time dislocations recover well without surgery, especially when treated early and followed by rehabilitation.

However, surgery may be considered as part of shoulder dislocation treatment when:

  • The shoulder dislocates repeatedly
  • There is a significant labrum injury such as a Bankart lesion
  • There are bony defects such as Hill Sachs lesions or glenoid bone loss
  • The shoulder cannot be reduced, or there is an associated fracture requiring fixation
  • The patient is a young athlete or has high risk of recurrence based on injury pattern and demands

Surgery may be considered when the shoulder keeps dislocating, particularly in younger patients and athletes where the risk of recurrence is higher and performance demands are greater.

Surgical options

Surgery is often performed arthroscopically using keyhole techniques. A common stabilisation procedure is arthroscopic Bankart repair, where the labrum and capsule are reattached to restore stability.

The exact procedure depends on whether the main issue is soft tissue injury, bone loss, or combined pathology.

Risks if a shoulder dislocation is not treated properly

Without proper follow-up, some patients develop recurrent instability, persistent pain, or reduced confidence in the shoulder. Recurrent episodes can also increase the risk of additional labrum damage and bony injury, which can make later shoulder dislocation treatment more complex.

FAQ About Shoulder Injuries

Can a shoulder dislocation heal on its own?

A dislocated shoulder cannot heal independently and would require an orthopaedic consultation for a proper diagnosis and treatment.

Recovery varies for each individual, usually varying between 3 to 6 months.

If you experience persistent shoulder pain, swelling, or abnormalities in shoulder movement, consult an orthopaedic specialist promptly. Remember that shoulder injury recovery can be lengthy, and early diagnosis helps avoid complications.

Surgery is not necessary for all patients and will be based on the severity of the rotator cuff tear.