What is a key feature of nursemaid's elbow?

A key feature of nursemaid's elbow, also known as radial head subluxation, is that the child typically experiences immediate relief and quickly resumes normal activity after the injury is reduced. This sudden return to normal function after a swift reduction is significant because it indicates that the joint has been restored to its proper position, alleviating pain and discomfort. Children often present with a reluctance to use the affected arm immediately after the injury, but once it is treated, they tend to engage in their usual activities without prolonged pain or limitations.

The other features, such as persistent activity post-reduction or complete resistance to movement, are not characteristic of this condition. Significant bruising is also not typical, as nursemaid's elbow usually occurs from a pull or yank on the arm rather than a traumatic impact that would cause bruising. Thus, the swift resumption of normal activity is a hallmark of this injury pattern.