Most likely your child has a condition known as "Calcaneal Apohphysitis" or "Sever's Disease". It is an inflammation of the heel’s growth plate due to overuse, repetitive stress and impact. This is frequently seen in young athletes and running and cleated sports are the most common causes. Most commonly we see limping and tenderness at the back and bottom of the heel which worsens with activity. It is important to have an x ray and full exam performed because there can be other causes such as an inflamed achilles tendon or fracture of the growth plate.
If your child is suffering from heel pain, don't just assume it's nothing. If it doesn't resolve in a few days, call us to make an appointment.