Around the age of 10 years old, it is common to see an active child with heel pain. It is most noticeable after gym or a sporting activity. The most common diagnosis I see for this problem is "apophysitis" or as it is more commonly known: "Severs Heel". This is an inflammation of the growth plate in the back of the heel. Treatment is always conservative and very effective. Stretching, ice, and anti-inlammatories work well. A visit to the podiatrist will be very useful to determine what else the pain might be from.