Severs? disease usually presents with pain in either one or both of a sufferer?s heels. The area can be sore or tender, particularly first thing in the morning or after squeezing. Because the pain is focussed on the heel, an important part of the foot that makes contact with the ground through virtually all movement, sufferers often have to limp to alleviate their discomfort. The pain of Severs? disease is at its worst after any exertion that involves contact between a heel and the ground, particularly strenuous exercise like running or sport. The condition is caused by the wear and tear of structures in the heel, most significantly the heel bone and any attached tendons. Severs? disease is prevalent in young children who are extremely active, particularly as the heel and its attached tendons are still growing in the age group the condition most commonly affects (7-14).
Predisposing Hereditary Factors: These are a biomechanical defect that one may be born with, which increases the chances of developing Sever’s Disease. Short Achilles Tendon, When the Achilles Tendon is short from birth, it will exaggerate the tightness of this tendon that occurs during a child’s growing years. This makes the pull of the Achilles Tendon on the heel’s growth plate more forceful than normal, causing inflammation and pain, and eventually Sever’s Disease. Short Leg Syndrome, When one leg is shorter than the other, the foot on the short leg must plantar flex (the foot and toes bend down) in order to reach the ground. In this way, the body tries to equalize the length of the legs. In order for the foot to plantar flex, the Achilles Tendon must pull on the heel with greater force than if the leg was a normal length. Thus the heel on the short leg will be more susceptible to Sever’s Disease during the foot’s growing years. Pronation. Is a biomechanical defect of the foot that involves a rolling outward of the foot at the ankle, so that when walking, the inner side of the heel and foot bears more of the body’s weight than is normal (click here for more information about pronation). Pronation thus causes the heel to be tilted or twisted. In order for the Achilles Tendon to attach to the heel, it must twist to reach its normal attachment site. This will shorten or tighten the Achilles Tendon and increase the force of its pull on the heel’s growth plate. This will increase the tightness of the Achilles Tendon during the foot’s growing years, and may help to initiate bouts of Sever’s Disease. Flat Arches and High Arches. Both of these biomechanical foot defects effect the pitch, or angle of the heel within the foot. When the heel is not positioned normally within the foot due to the height of the arch, the Achilles Tendon’s attachment to the heel is affected. This may produce a shortening or tightening of the Achilles Tendon, which increases the force of its pull on the heel’s growth plate. During the foot’s growing years, abnormal arch height may contribute to the onset of Sever’s Disease.
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.
Children or adolescents who are experiencing pain and discomfort in their feet should be evaluated by a physician. In some cases, no imaging tests are needed to diagnose Sever?s disease. A podiatrist or other healthcare professional may choose to order an x-ray or imaging study, however, to ensure that there is no other cause for the pain, such as a fracture. Sever?s disease will not show any findings on an x-ray because it affects cartilage.
Non Surgical Treatment
The simplest form of treatment is rest. Symptoms usually peak during activity. If the growth plate of the heel is allowed ample rest time and the amount of pressure is reduced, circumstances will improve. To aid in decreasing pain and swelling, wrap the heel with an ice pack. Your podiatrists at Advanced Foot & Ankle of Arizona will provide you with the perfect guide to recovery. After examination of the affected foot, time taken off from physical activity may be recommended. Stretching exercises and physical therapy will help strengthen the tendons and muscles surrounding the growth plate.