Sever?s disease is similar to Osgood-Schlatter disease of the knee in that they both involve a partial detachment or tearing of the tendon from the bone. The difference is location: Osgood-Schlatter occurs at the knee, and Sever?s occurs at the ankle. In Sever?s disease, which usually occurs in children from the ages of 8 to 14, the Achilles tendon begins to tear away from its insertion into the calcaneus or heel bone. This injury can be very painful and affect highly active to somewhat inactive children. Symptoms include pain that increases with activity, localized pain in the back of the foot, tenderness to the touch, and swelling. Treatment includes rest, ice, compression, elevation, and nonsteroidal anti-inflammatory medication as necessary.
Apart from age, other factors that may contribute to developing Sever?s disease include physical activity, any form of exercise that is weight bearing through the legs or stresses the soft tissue can exacerbate the pain of the disease. External factors, for example, running on hard surfaces or wearing inappropriate shoes during sport. Overuse injury, very active children may repeatedly but subtly injure the bones, muscles and tendons of their feet and ankles. In time, the accumulated injuries cause symptoms.
Pain is usually felt at the back and side of the heel bone. Sometimes there may be pain at the bottom of the heel. The pain is usually relieved when the child is not active and becomes painful with sport. Squeezing the sides of the heel bone is often painful. Running and jumping make the symptoms worse. One or both heels can be affected. In more severe cases, the child may be limping.
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
Primary treatment involves the use of heel cups or orthotics with a sturdy, supportive plastic shell. Treatment may also include cutting back on sports activities if pain interferes with performance, calf muscle stretching exercises, icing, and occasionally anti-inflammatory medications. Severe cases may require the short term use of a walking boot or cast.
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.