Can shoulder dislocation cause shoulder instability?

Instability may feel like the shoulder is loose, shifting, giving way or about to come out during certain movements. It can occur after a single injury or after repeated dislocations.

The upper arm bone normally stays centred in a shallow socket with help from the joint capsule, ligaments, labrum and surrounding muscles. A dislocation forces the ball out of the socket and may stretch the capsule or ligaments, injure the labrum, or affect the bone. These changes can make the joint less able to resist unwanted movement.

Symptoms can include apprehension when reaching overhead or behind the body, a slipping sensation, repeated partial dislocations, pain, or weakness. A clinician can assess movement, strength and joint stability, and decide whether imaging is useful.

If the shoulder is currently out of place, keep the arm supported in the position found and seek urgent medical care. Do not try to force it back into the socket yourself, because nearby nerves, blood vessels or bone may be injured.

After the joint has been reduced and checked, follow the advised protection and rehabilitation plan. Physiotherapy commonly works on comfortable range of motion, rotator-cuff strength, shoulder-blade control and gradual return to work or sport. Avoid movements that reproduce a slipping feeling until a clinician has assessed them. Persistent or recurrent instability may need an orthopaedic review to discuss further imaging and treatment options.

Seek emergency care for an obvious deformity, severe pain after injury, inability to move the arm, new numbness or weakness, or a hand that becomes cold, pale or blue. These signs need prompt assessment even if the shoulder seems to move back into place on its own.

Arrange a non-emergency appointment if the shoulder repeatedly slips, feels unreliable, limits sleep or daily activity, or remains painful after the initial injury. Early assessment can identify the damaged structures and guide a safer rehabilitation plan.

Ask which structures may have been injured, whether an X-ray or other scan is appropriate, which movements should be restricted for now, and when rehabilitation can progress. If slipping has happened more than once, ask whether your activity demands or examination findings make an orthopaedic opinion helpful.