This is a partial dislocation of the elbow joint seen with children. The elbow ligaments of a child are loose compared to an adult. Thus, pulling on the arm may cause a hyperextended elbow. A typical story is a child who does not want to move his or her arm after being pulled.
No X-rays are needed if the story is clear and there is no swollen elbow.
The treatment of nursemaid’s elbow is to push at the top the radius bone while supinating and flexing the arm. Usually, a click is felt. Observation post reduction of the dislocated elbow for 10-15 minutes is needed. The goal is to observe the child reach for objects using the affected arm.