A shoulder dislocation is one of the most common traumatic injuries seen in sports. The shoulder joint (glenohumeral joint) is designed for movement and flexibility, but that same mobility makes it vulnerable to instability. In some cases, a shoulder dislocation and nerve damage occur together, which can significantly affect recovery and function. Recognising and managing nerve injury with shoulder dislocation is crucial for complete rehabilitation.

What Happens During a Shoulder Dislocation

A shoulder dislocation occurs when the upper arm bone (humerus) is forced out of its socket in the shoulder blade (glenoid). This often happens during contact sports, falls, or forceful overhead movements. The most common type is an anterior dislocation, where the humeral head moves forward. Posterior dislocations are less frequent but can occur after seizures, electrical shocks or a fall onto an outstretched hand. 

When the shoulder dislocates, the surrounding structures — including muscles, tendons, ligaments, and nerves — can be stretched or torn. One of the most critical nerves at risk is the axillary nerve, which supplies the deltoid and teres minor muscles and provides sensation to the outer shoulder. However, other nerves can also be affected:

Other complications of shoulder dislocations include: 

brachial plexus picture

Symptoms of Nerve Injury with Shoulder Dislocation

When nerve injury with shoulder dislocation occurs, symptoms may include:

  • Numbness or tingling over the outside of the shoulder (especially in axillary nerve injury)

  • Weakness in lifting the arm or maintaining it in an elevated position

  • Muscle wasting in the shoulder over time if the nerve fails to recover

  • Ongoing burning, sharp, or radiating pain down the arm (if other nerves are involved) 

  • Loss of coordination or altered shoulder contour

These symptoms may persist even after the dislocation has been reduced and the joint appears to have healed.

Clinical Presentation of Shoulder Dislocation and Nerve Damage 

In the acute setting, shoulder deformity and pain dominate the clinical picture. Once the dislocation is reduced, careful nerve assessment becomes essential. The clinician will test for:

  • Sensation over the “regimental badge” area (outer shoulder), which reflects the axillary nerve function or reduced sensation in the forearm or hand for the other nerves. 

  • Muscle strength in the shoulder (lifting the arm away from the body), elbow or hand movements

  • It is essential to examine the neck and shoulder to exclude other causes of reduced shoulder movements. Other complications include humerus fractures, rotator cuff tears, and nerve root damage in the neck, which can cause muscle wasting, reduced movement and altered sensation. 
  • Nerve-related burning pain (also called neuropathic pain) may be present and indicates a more severe injury. 

Because swelling and pain can obscure early signs, a repeat assessment a few days after reduction is often necessary.

Increased risk of nerve damage following a shoulder dislocation is correlated with the following:

  • Older age 
  • Increased duration of dislocation 
  • First-time dislocator 
  • Other injuries, such as a greater tuberosity fracture or rotator cuff tear 

Investigations

Investigations help identify both structural and neurological damage following a shoulder dislocation and nerve injury.

Plain X-rays are used first to confirm the dislocation and rule out fractures. MRI scanning provides a detailed view of soft tissue injuries, including labral tears, rotator cuff tears, and nerve entrapment. Ultrasound is a valuable dynamic tool to evaluate nerve swelling or compression.

If nerve symptoms persist beyond two to three weeks, electromyography (EMG) and nerve conduction studies can assess the extent of nerve damage and guide prognosis. These tests help distinguish between a temporary stretch injury (neurapraxia) and a more serious axonal injury that may take months to recover.

Treatment and Recovery

The initial management of a shoulder dislocation and nerve damage involves prompt reduction of the dislocated joint, pain control, and immobilisation in a sling. Once the joint is stabilised, attention turns to the nerve injury.

If a nerve injury is suspected, it is essential to see a doctor to document the exact injury and its severity. 

Most cases of nerve injury with shoulder dislocation are neurapraxias — temporary conduction blocks that recover spontaneously over weeks to months. During this period, physiotherapy is crucial to maintain joint mobility, prevent stiffness, and protect the shoulder from further dislocation.

If EMG testing shows ongoing denervation or poor recovery, further imaging may be warranted to look for entrapment or scarring around the nerve. Sequential EMG studies and ultrasound may be needed to assess healing. If there is no evidence of nerve reinervation, surgical exploration or nerve grafting may be required to restore function. Surgery should be considered if there is no reliable recovery of nerve function within 6 months of the injury. Options for surgery include nerve release, transfer, or grafting. 

Prognosis

The majority of nerve injuries associated with shoulder dislocations recover within 3 to 6 months. However, recovery depends on the severity and type of nerve injury, the patient’s age, and the presence of associated fractures or soft tissue tears. Persistent weakness, shoulder instability, or chronic pain may require longer-term rehabilitation and, in select cases, surgical intervention.

Final Word from Sportdoctorlondon about Shoulder Dislocation and Nerve Damage 

Shoulder dislocation and nerve damage are closely linked, particularly in older athletes or high-impact injuries. Recognising the signs of nerve injury with shoulder dislocation is vital, as early diagnosis and rehabilitation can prevent long-term dysfunction. A comprehensive assessment using clinical examination, imaging, and electrodiagnostic testing ensures accurate diagnosis and guides effective treatment. If you’ve suffered a shoulder dislocation and notice numbness, weakness, or burning pain afterwards, it’s essential to seek review by a sports or musculoskeletal specialist to assess for possible nerve involvement.