What Is Severs Disease?
Sever?s disease or Sever?s lesion refers to an injury to the bone growth plate at the back of the heel bone (calcaneous) in young people, particularly those who are physically active. It usually develops in puberty and is slightly more common in boys than girls.
The calcaneal apophysis develops as an independent center of ossification (possibly multiple). It appears in boys aged 9-10 years and fuses by age 17 years, it appears in girls at slightly younger ages. During the rapid growth surrounding puberty, the apophyseal line appears to be weakened further because of increased fragile calcified cartilage. Microfractures are believed to occur because of shear stress leading to the normal progression of fracture healing. This theory explains the clinical picture and the radiographic appearance of resorption, fragmentation, and increased sclerosis leading to eventual union. The radiographs showing fragmentation of the apophysis are not diagnostic, because multiple centers of ossification may exist in the normal apophysis, as noted. However, the degree of involvement in children displaying the clinical symptoms of Sever disease appears to be more pronounced. In a study of 56 male students from a soccer academy, of whom 28 had Sever disease and 28 were healthy control subjects, findings suggested that higher heel plantar pressures under dynamic and static conditions were associated with Sever disease, though it was not established whether the elevated pressures predisposed to or resulted from the disease. Gastrocnemius ankle equinus also appeared to be a predisposing factor.
In Sever?s disease, heel pain can be in one or both heels. It usually starts after a child begins a new sports season or a new sport. Your child may walk with a limp. The pain may increase when he or she stands on tiptoe. Your child?s heel may hurt if you squeeze both sides toward the very back. This is called the squeeze test. Your provider may also find that your child?s heel tendons have become tight.
The doctor may order an x-ray because x-rays can confirm how mature the growth center is and if there are other sources of heel pain, such as a stress fracture or bone cyst. However, x-rays are not necessary to diagnose Sever?s disease, and it is not possible to make the diagnosis based on the x-ray alone.
Non Surgical Treatment
Treatment of Severs disease usually involves a combination of an accurate analysis of your child?s gait, muscles, tendons, ligaments and joints is a crucial first step. Specific stretching and strengthening exercises often make up part of the treatment. Anti-inflammatory measures such as ice baths after exercise can be helpful in the short term. Footwear review, assessment and advice is important. Orthotic devices are often needed to firstly control any abnormal traction or tension on the heel growth plate and, secondly, too unload the ground reaction forces on the heel bone. Podiatry Care has podiatrists with specific paediatric training enabling them to utilise treatment options to relieve heel pain in children very quickly. If your child is struggling to play sport, see a Podiatry Care podiatrist near you. In severe cases modification to activity levels may be required. Treatment of Severs disease does NOT require surgery. This foot condition responds very well to conservative treatment.
For children with Sever's disease, it is important to habitually perform exercises to stretch the hamstrings, calf muscles, and the tendons on the back of the leg. Stretching should be performed 2-3 times a day. Each stretch should be performed for 20 seconds, and both legs should be stretched, even if the pain is only in one heel. Heel cups or an inner shoe heel lifts are often recommended for patient suffering from Sever's disease. Wearing running shoes with built in heel cups can also decrease the symptoms because they can help soften the impact on the heel when walking, running, or standing.