Many things can cause leg pain. Too much exercise or overuse can cause a muscle cramp (or charley horse). Leg cramps may sometimes be related to dehydration or low levels of certain minerals, such as potassium, calcium, or magnesium. Some medicines can also cause leg cramps. Other causes of leg pain include injuries, blood flow problems, and nerve damage.
You can usually ease your child's pain at home. Your doctor may recommend that your child rest the leg and keep it elevated.