Sever's disease (calcaneal apophysitis) is a common cause of heel pain, particularly in physically active young people who are about to begin puberty. The cause is uncertain, but it is thought that
the long calf bones of the leg grow faster than the surrounding muscle and soft tissue, causing the Achilles tendon to pull uncomfortably tight.
The actual pathology of the condition is one of more of an overuse syndrome in which the growth plate of the heel may become slightly displaced, causing pain. Biopsies of similar conditions have
shown changes consistent with separation of the cartilage. The cause of Sever's disease is not entirely clear. It is most likely due to overuse or repeated minor trauma that happens in a lot of
sporting activities - the cartilage join between the two parts of the bone can not take all the shear stress of the activities. Some children seem to be just more prone to it for an unknown reason,
combine this with sport, especially if its on a hard surface and the risk of getting it increases. A pronated foot and tight calf muscles are common contributing factors. The condition is very
similar to Osgood-Schlatters Disease which occurs at the knee.
The most prominent symptom of Sever?s disease is heel pain which is usually aggravated by physical activity such as walking, running or jumping. The pain is localised to the posterior and plantar
side of the heel over the calcaneal apophysis. Sometimes, the pain may be so severe that it may cause limping and interfere with physical performance in sports. External appearance of the heel is
almost always normal, and signs of local disease such as edema, erythema (redness) are absent. The main diagnostic tool is pain on medial- lateral compression of the calcaneus in the area of growth
plate, so called squeeze test. Foot radiographs are usually normal. Therefore the diagnosis of Sever?s disease is primarily clinical.
Your podiatrist will take a comprehensive medical history and perform a physical examination including a gait analysis. The assessment will include foot posture assessment, joint flexibility (or
range of motion), biomechanical assessment of the foot, ankle and leg, foot and leg muscle strength testing, footwear assessment, school shoes and athletic footwear, gait analysis, to look for
abnormalities in the way the feet move during gait, Pain provocation tests eg calcaneal squeeze test. X-rays are not usually required to diagnose Sever?s disease.
Non Surgical Treatment
Initially, Sever?s Disease is treated with rest, anti-inflammatory medication and softer shoes. Ice followed by heat is a common practice and heel cup orthotics have worked wonders for our young
patients in the past. It can take anywhere from a few weeks to a year for these growth plates to naturally close - at which point Sever?s Disease disappears. Even though the condition does heal on
its own, athletes are encouraged to seek treatment, rather than push through the pain. Simply ?dealing with it? and continuing to play sports despite the injury could lead to an impaired gait, a
strained hip or a knee injury. Stretches to strengthen the leg muscles, leg compression wraps and over-the-counter acetaminophen or ibuprofen are also recommended treatments. In very rare cases, a
podiatrist may recommend wearing a cast for two to twelve weeks.
Exercises that help to stretch the calf muscles and hamstrings are effective at treating Sever's disease. An exercise known as foot curling, in which the foot is pointed away from the body, then
curled toward the body in order to help stretch the muscles, has also proven to be very effective at treating Sever's disease. The curling exercise should be done in sets of 10 or 20 repetitions, and
repeated several times throughout the day.