Dislocated Shoulder Definition

A dislocated shoulder often occurs suddenly as the result of trauma, during which the person experiences a “popping” sensation followed by shoulder pain and/or inability to move the arm.

Most dislocations are anterior dislocations—in which the humeral head moves out of the socket toward the front of the body—and their diagnosis is fairly straightforward. Posterior (back of body) dislocations account for a small percentage of shoulder dislocations.