Sever's Disease

• Sever's disease is a painful inflammation of the calcaneal apophysis made worse with activity.
• It is thought to be caused by repetitive trauma to the weaker structure of the apophysis, induced by the pull of the Achilles tendon on its insertion.
• It occurs most frequently in active 10- to 12-year-old boys.
• The pain can limit performance and participation, and if left untreated, the pain can significantly limit even simple activities of daily life.
• Xrays are useful in ruling out other causes of heel pain like fracture or rare tumor but are not diagnostic or prognostic. 
• Treatment consist of rest, nsaids, wearing a half-inch inner-shoe heel lift (at all times during ambulation), a monitored stretching program, and presport and postsport icing. (rarely casting)
• Sever disease is a self-limited condition and will resolve after the growth plate fuses.

References

http://www.emedicine.com/orthoped/topic622.htm