The muscle group at the back of the lower leg is commonly called the calf. The calf comprises of 2 major muscles (known as the gastrocnemius and soleus) both of which insert into the heel bone via the Achilles tendon. In people who have not yet reached skeletal maturity, a growth plate exists where the Achilles tendon inserts into the heel bone. This growth plate is primarily comprised of cartilage. Every time the calf contracts, it pulls on the Achilles tendon which in turn pulls on the heel’s growth plate. When this tension is too forceful or repetitive, irritation to the growth plate may occur resulting in pain and sometimes an increased bony prominence at the back of the heel. This condition is called Severs disease. Severs disease is typically seen in children or adolescents during periods of rapid growth. This is because muscles and tendons become tighter as bones become longer. As a result, more tension is placed on the heel’s growth plate.
Inflammation occurs at the insertion of the achilles tendon into the back of the heel due to a number of reasons. One or several of the following may cause the initiation of Sever?s disease. Rapid growth spurt. Tight calf muscles. Change in footwear (soccer boots / athletic shoes no heel). Excessive rolling in of feet. Poor warm up routine. Remember this condition usually settles as the growth plate fuses within 6-12 months.
Symptoms of Sever?s disease, mostly pain at the back of heel, usually occur during and after sporting activity, and usually disappear with rest. In some cases, children may find it difficult to place pressure on their heels, and begin walking on their toes to gain relief. For some children, the heel pain will persist until the next morning, causing some stiffness or hobbling on first arising. Some children may experience mild swelling at the back of the heel.
A doctor or other health professional such as a physiotherapist can diagnose Sever?s disease by asking the young person to describe their symptoms and by conducting a physical examination. In some instances, an x-ray may be necessary to rule out other causes of heel pain, such as heel fractures. Sever?s disease does not show on an x-ray because the damage is in the cartilage.
Non Surgical Treatment
Sever?s disease is believed to be the byproduct of repepitive stress and trauma to the growth plate in the calcaneous, or heel bone. The stress is from the pull of the Achilles tendon on the growth plate where the tendon attaches.