Sever’s Disease is a serious type of ‘growing pain’ rooted in the fact that the rate of growth of a child’s heel bones is slower than that of the ligaments of the leg. The heel bone is one of the first bones in the human body to reach full size, and it is prone to injury because it is not flexible or elastic. As a child goes through growth spurts of the heel bone, the Achilles tendon, which connects the calf muscle to the heel, may be struggling to play catch-up, due to its slower rate of growth. In this scenario, the tendon and leg muscles can become strained, tight and over-stretched. As the child walks, runs or plays, repetitive pressure is placed on the tendon, and the tension can cause damage to the growing heel bone, resulting in pain and inflammation.
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.
Symptoms of calcaneal apophysitis may include Pain in the back or bottom of the heel, Limping, Walking on toes, Difficulty running, jumping, or participating in usual activities or sports, Pain when the sides of the heel are squeezed.
Sever’s disease is based on the symptoms reported. To confirm the diagnosis, the clinician will examine the heels and ask about the child’s activity level and participation in sports. They may also squeeze the back part of the heel from both sides at the same time to see if doing so causes pain and also ask the child to stand on tiptoes to see if that position causes pain. There may be tightness in the calf muscle, which contributes to tension on the heel. Symptoms are usually worse during or after activity and get better with rest. X-rays generally are not that helpful in diagnosing Sever’s disease, but they may be ordered to rule out other problems, such as fractures. Sever’s disease cannot be seen on an X-ray.
Non Surgical Treatment
Stretching programs. Strengthening exercises. Exercise and training modification. Orthotic therapy. In rare cases, where fragmentation of the apophysis exists and pain fails to subside with traditional treatments then immobilization of the foot and ankle with a short leg pneumatic walker(walking cast) is indicated.
It may take several weeks or months for the pain to completely stop. In most cases severs disease goes away on its own with a little rest and time. However if you ignore the pain and play through it, the condition may get worse and may be more difficult to treat. When the pain is completely gone, you can slowly return to your previous level of activity. With future growth spurts the pain may return therefore keep up with the stretches and follow the advice given.