Overview
Sever?s is described as a traction apophysitis. In childhood our bones are made of a cartilage mould of the bone, which over time as we grow slowly turns into a full bone. The reason for this is that it is easier to grow cartilage to the length required, and then back fill with bone later than it is to actually grow new bone. Most bones have a least two growth of bone centres, one by the joint and one making the main body of the bone. In the growing heel bone (calcaneus) the posterior part has a separate growth area where the Achilles tendon attaches. When playing lots of sport, especially football, rugby and hockey, the two areas of bone can be pulled apart, producing pain. Recent evidence has also suggested that the appearance of this condition on MRI (magnetic resonance imaging), appears to indicate that Sever?s is a type of stress fracture. Whether that fatigue stress is from compression or tension remains in debate, and is probably a combination of both.
Causes
Young athletes typically sustain the injury due to repeated stress caused by running and jumping. Partaking in any high speed sports can thus partly provoke the condition, such as football, rugby, basketball, hockey or track athletics. Crucially the injury is linked to overuse, so exercising with fatigued leg muscles, without a suitable warm up, or beginning a new strenuous physical activity are all risk factors. Placing excessive weight or pressure on the heel can also cause the injury. Another factor related to Sever's disease is overpronation, a biomechanical error that makes the foot roll too far inwards.
Symptoms
The symptoms include pain, tenderness, swelling or redness in the heel, and they might have difficulty walking or putting pressure on the heel. If you notice that your child suddenly starts walking around on their toes because their heels hurt, that?s a dead giveaway. Kids who play sports might also complain of foot pain after a game or practice. As they grow, the muscles and tendons will catch up and eventually the pressure will subside along with the pain. But in the meantime, it can become very uncomfortable.
Diagnosis
Sever?s disease can be diagnosed based on your history and symptoms. Clinically, your physiotherapist will perform a "squeeze test" and some other tests to confirm the diagnosis. Some children suffer Sever?s disease even though they do less exercise than other. This indicates that it is not just training volume that is at play. Foot and leg biomechanics are a predisposing factor. The main factors thought to predispose a child to Sever?s disease include a decrease in ankle dorsiflexion, abnormal hind foot motion eg overpronation or supination, tight calf muscles, excessive weight-bearing activities eg running.
Non Surgical Treatment
Treatment is primarily supportive, with rest, pain management, and activity modification. Activity modifications include the addition of low-impact activities. Gel heel cups are sold over the counter and can be used intermittently to help reduce shock in the heel, as well as take tension off of the tight Achilles?s tendon complex. Proper stretching and strengthening activities should be preformed routinely even during periods of no pain. A large study showed that approximately 85% of children affected by Sever?s disease return to full activity within a two-month time period after starting treatment.
Prevention
The old adage, "An once of prevention is worth a pound of cure," is most appropriate when trying to prevent the effects of Sever's Disease. If this condition is not prevented, or treated in its earliest stages, it may cause the child to stop certain sports activities until the growth plate has fused and matured (this usually occurs around the age of 16 years old). Long Term Treatment and Prevention must be directed towards protecting the growth plate at the back of the heel during a child's growing years. Being aware of the following best does this. If the child is very active in sports that require repetitive and exertive activities, then the parents must be vigilant when it comes to the child's gait, watching to see if he or she is limping, walking on their toes, or complaining of heel pain when weight-bearing. These may be "early warning signs" of Sever's Disease. Along with these signs, if your child has any of the Predisposing Hereditary Factors listed above, the chances of Sever's Disease occurring increased.
Sever?s is described as a traction apophysitis. In childhood our bones are made of a cartilage mould of the bone, which over time as we grow slowly turns into a full bone. The reason for this is that it is easier to grow cartilage to the length required, and then back fill with bone later than it is to actually grow new bone. Most bones have a least two growth of bone centres, one by the joint and one making the main body of the bone. In the growing heel bone (calcaneus) the posterior part has a separate growth area where the Achilles tendon attaches. When playing lots of sport, especially football, rugby and hockey, the two areas of bone can be pulled apart, producing pain. Recent evidence has also suggested that the appearance of this condition on MRI (magnetic resonance imaging), appears to indicate that Sever?s is a type of stress fracture. Whether that fatigue stress is from compression or tension remains in debate, and is probably a combination of both.
Causes
Young athletes typically sustain the injury due to repeated stress caused by running and jumping. Partaking in any high speed sports can thus partly provoke the condition, such as football, rugby, basketball, hockey or track athletics. Crucially the injury is linked to overuse, so exercising with fatigued leg muscles, without a suitable warm up, or beginning a new strenuous physical activity are all risk factors. Placing excessive weight or pressure on the heel can also cause the injury. Another factor related to Sever's disease is overpronation, a biomechanical error that makes the foot roll too far inwards.
Symptoms
The symptoms include pain, tenderness, swelling or redness in the heel, and they might have difficulty walking or putting pressure on the heel. If you notice that your child suddenly starts walking around on their toes because their heels hurt, that?s a dead giveaway. Kids who play sports might also complain of foot pain after a game or practice. As they grow, the muscles and tendons will catch up and eventually the pressure will subside along with the pain. But in the meantime, it can become very uncomfortable.
Diagnosis
Sever?s disease can be diagnosed based on your history and symptoms. Clinically, your physiotherapist will perform a "squeeze test" and some other tests to confirm the diagnosis. Some children suffer Sever?s disease even though they do less exercise than other. This indicates that it is not just training volume that is at play. Foot and leg biomechanics are a predisposing factor. The main factors thought to predispose a child to Sever?s disease include a decrease in ankle dorsiflexion, abnormal hind foot motion eg overpronation or supination, tight calf muscles, excessive weight-bearing activities eg running.
Non Surgical Treatment
Treatment is primarily supportive, with rest, pain management, and activity modification. Activity modifications include the addition of low-impact activities. Gel heel cups are sold over the counter and can be used intermittently to help reduce shock in the heel, as well as take tension off of the tight Achilles?s tendon complex. Proper stretching and strengthening activities should be preformed routinely even during periods of no pain. A large study showed that approximately 85% of children affected by Sever?s disease return to full activity within a two-month time period after starting treatment.
Prevention
The old adage, "An once of prevention is worth a pound of cure," is most appropriate when trying to prevent the effects of Sever's Disease. If this condition is not prevented, or treated in its earliest stages, it may cause the child to stop certain sports activities until the growth plate has fused and matured (this usually occurs around the age of 16 years old). Long Term Treatment and Prevention must be directed towards protecting the growth plate at the back of the heel during a child's growing years. Being aware of the following best does this. If the child is very active in sports that require repetitive and exertive activities, then the parents must be vigilant when it comes to the child's gait, watching to see if he or she is limping, walking on their toes, or complaining of heel pain when weight-bearing. These may be "early warning signs" of Sever's Disease. Along with these signs, if your child has any of the Predisposing Hereditary Factors listed above, the chances of Sever's Disease occurring increased.
