Which finding would indicate to the nurse that a child may be experiencing complications of hemophilia?

The presence of joint swelling and pain is a significant indicator that a child may be experiencing complications related to hemophilia. Hemophilia is a genetic disorder that impairs the blood's ability to clot, which can lead to internal bleeding, particularly within the joints. This condition, known as hemarthrosis, can cause swelling, pain, and reduced mobility in the affected joints, often resulting from minor injuries or spontaneous bleeding episodes.

In children with hemophilia, joint health is a major concern, as repeated bleeding episodes can lead to chronic conditions, including joint deformities and osteoarthritis. Recognizing symptoms such as swelling and pain in the joints allows for timely intervention to prevent further complications and improve the child's quality of life.

The other options, while they may present in certain contexts or conditions, do not specifically indicate complications associated with hemophilia in the way that joint swelling and pain do. Frequent sprains may occur in active children, but they are not directly linked to hemophilia complications. High fever and pale skin can indicate other health issues or infections but are not classical complications of hemophilia itself.