Severs disease (calcaneal apophysitis) is a self-limiting condition seen in physically active children. Although there is controversy about the radiographic appearance, some reports propose the
importance of fragmentation of the secondary nucleus in the diagnosis of Severs disease. We studied secondary nucleus of the calcaneus with ultrasonography. Twenty-one symptomatic heels of 14
children were examined. All these heels showed fragmentation of the secondary nucleus on both conventional radiograph and sonography. Ultrasonographic examination also showed 2 retrocalcaneal
bursitis. Our initial data showed that sonography may be valuable in the diagnosis of Severs disease.
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.
Sever condition is diagnosed by detecting the characteristic symptoms and signs above in the older children, particularly boys between 8 and 15 years of age. Sometimes X-ray testing can be helpful as
it can occasionally demonstrate irregularity of the calcaneus bone at the point where the Achilles tendon attaches.
Non Surgical Treatment
Your physiotherapist will guide you and utilise a range of pain relieving techniques including joint mobilisations for stiff ankle or subtalar joints, massage or electrotherapy to assist you during
this pain-full phase. Your physiotherapist will identify stiff joints within your foot and ankle complex that they will need to loosen to help you avoid overstress. A sign that you may have a stiff
ankle joint can be a limited range of ankle bend during a squat manoeuvre. Your physiotherapist will guide you. Your foot arch is dynamically controlled via important foot arch muscles, which be weak
or have poor endurance. These foot muscles have a vital role as the main dynamically stable base for your foot and prevent excessive loading through your plantar fascia. Any deficiencies will be an
important component of your rehabilitation. Your physiotherapist is an expert in the assessment and correction of your dynamic foot control. They will be able to help you to correct your normal foot
biomechanics and provide you with foot stabilisation exercises if necessary.
Stretching exercises can help. It is important that your child performs exercises to stretch the hamstring and calf muscles, and the tendons on the back of the leg. The child should do these
stretches 2 or 3 times a day. Each stretch should be held for about 20 seconds. Both legs should be stretched, even if the pain is only in 1 heel. Your child also needs to do exercises to strengthen
the muscles on the front of the shin. To do this, your child should sit on the floor, keeping his or her hurt leg straight. One end of a bungee cord or piece of rubber tubing is hooked around a table
leg. The other end is hitched around the child's toes. The child then scoots back just far enough to stretch the cord. Next, the child slowly bends the foot toward his or her body. When the child
cannot bend the foot any closer, he or she slowly points the foot in the opposite direction (toward the table). This exercise (15 repetitions of "foot curling") should be done about 3 times. The
child should do this exercise routine a few times daily.