The condition is more common in young people active in sport, and boys are more frequently affected than girls. One study found the average age of presentation was around 12 years for boys and 9 years for girls. In one prospective study of injuries among players aged 9-19 years in football academies, 2% of overall football injuries were due to Sever’s disease; the peak for incidence was in the under-11 age group. In a study of 85 children, the condition was bilateral in 61%.
Sever disease, like other similar conditions (eg, Osgood-Schlatter disease, little-leaguer’s elbow, and iliac apophysitis), is believed to be caused by decreased resistance to shear stress at the bone-growth plate interface. Studies have indicated that traction apophyses have a higher composition of fibrocartilage than epiphyses subjected more to axial load, which are composed predominantly of hyaline cartilage. The anatomy of the calcaneal apophysis lends to significant shear stress because of its vertical orientation and the direction of pull from the strong gastrocnemius-soleus muscle group.
The condition can be quite disabling and tends to affect those who are very busy with sporting activities. In the initial stages of the condition, most children displaying signs of Severs disease will tend to hobble or limp off the sports field or court and complain of sore heels near the end of activity. As the condition progresses, children may complain of pain during activity and in severe cases prior to sporting activities. Kids heel pain can be quite discouraging for active children but, early treatment can resolve this type of foot pain in children very quickly.
Radiography. Most of the time radiographs are not helpful because the calcaneal apophysis is frequently fragmented and dense in normal children. But they can be used to exclude other traumas. Ultrasonography. could show the fragmentation of secondary nucleus of ossification of the calcaneus in severs?s disease. This is a safe diagnostic tool since there is no radiation. This diagnostic tool can also be used to exclude Achilles tendinitis and/or retrocalcaneal bursitis.
Non Surgical Treatment
The immediate goal of treatment is pain relief. Because symptoms generally worsen with activity, the main treatment for Sever’s disease is rest, which helps to relieve pressure on the heel bone, decreasing swelling and reducing pain. As directed by the doctor, a child should cut down on or avoid all activities that cause pain until all symptoms are gone, especially running barefoot or on hard surfaces because hard impact on the feet can worsen pain and inflammation. The child might be able to do things that do not put pressure on the heel, such as swimming and biking, but check with a doctor first.
Because there are several theories as to the actual cause of the disease, there is no definitive answer on prevention. Experts agree, though, that youth athletes can help minimize the risk of Sever’s disease by maintaining good joint and muscle flexibility while engaging in sports or physical activities.