The condition is more common in young people active in sport, and boys are more frequently affected than girls. One study found the average age of presentation was around 12 years for boys and 9 years for girls. In one prospective study of injuries among players aged 9-19 years in football academies, 2% of overall football injuries were due to Sever’s disease; the peak for incidence was in the under-11 age group. In a study of 85 children, the condition was bilateral in 61%.
Overuse and stress on the heel bone through participation in sports is a major cause of calcaneal apophysitis. The heel?s growth plate is sensitive to repeated running and pounding on hard surfaces, resulting in muscle strain and inflamed tissue. For this reason, children and adolescents involved in soccer, track, or basketball are especially vulnerable. Other potential causes of calcaneal apophysitis include obesity, a tight Achilles tendon, and biomechanical problems such as flatfoot or a high-arched foot.
Sever condition causes pain at the back of the heel. The pain is increased with plantar flexion of the ankle (pushing down with the foot as if stepping on the gas), particularly against resistance. Sever condition also causes tenderness and swelling in the area of the pain.
Sever?s disease can be diagnosed based on the symptoms your child has. Your child?s doctor will conduct a physical examination by squeezing different parts of your child?s foot to see if they cause any pain. An X-ray may be used to rule out other problems, such as a broken bone or fracture.
Non Surgical Treatment
Treatment for Sever?s disease is mainly supportive, to stop inflammation and reduce pain. The condition will resolve on its own when the growth in the growth plate is complete, but until then, measures can be taken to resolve pain and discomfort. Applying ice to the painful or swollen areas on the foot may provide some short-term relief from pain and prevent further inflammation. Ice can be applied for about 20 minutes two or three times a day. Footwear that is too big, too small, or does not provide proper support can exacerbate the symptoms of Sever?s disease. Supportive footwear is important to prevent discomfort, especially in children who participate in sports and activities that take place on a hard surface (such as pavement or a basketball court). Shoes should also have adequate padding and not rub against the heel. In some cases, shoes that do not have heels (such as sandals) may be more comfortable to wear while the heel is healing, but care should be taken that the shoe provides proper support to the rest of the foot. Children with Sever?s disease should avoid going barefoot.Children with flat feet, high arches, or over-pronation may need treatment to resolve these underlying conditions. In many cases, an orthotic worn inside the shoe can help put the foot into a better alignment and provide relief to the foot or the arch. Children who are overweight or obese may be counseled to lose weight. Being overweight can contribute to the development of several conditions, including Sever?s disease. Resting the foot and discontinuing sports and other activities until the pain and stiffness is resolved may be recommended. In extreme cases, a walking boot or a cast might be used to completely immobilize the foot. A physical therapist may recommend stretching exercises for the muscles in the calf and the Achilles tendon. A stretching routine is usually done several times a day. Stretching these muscles can help improve strength and decrease the stress on the heel plate. Some physicians may recommend over-the-counter pain relievers such as ibuprofen or acetaminophen. Care must be taken when administering these medications to children, especially with acetaminophen, as overdoses are possible when using more than one medication containing acetaminophen. Aspirin should never be given to children. The utility of pain relievers in children must be weighed against their possible side effects. For small variations-less than an inch or so-shoe lifts can help equalize the length of the legs. In cases with more variation between legs, surgical solutions may be considered. Research indicates that targeted manual therapy techniques performed by a licensed physical therapist can help to reduce pain from Sever?s Disease and to improve muscle function. When the larger calf muscles and the smaller ankle and foot muscles become tight, this tightness can affect the mechanics of the ankle joint. Manual therapy includes both joint and muscle release techniques to restore optimal function to the calf, ankle, and foot muscles, and results can generally be achieved within a few months.
This condition is self limiting, it will go away when the two parts of bony growth join together, this is natural. Unfortunately, Sever’s disease can be very painful and limit sport activity of the child while waiting for it to go away, so treatment is often advised to help relieve it. In a few cases of Sever’s disease, the treatment is not successful and these children will be restricted in their activity levels until the two growth areas join, usually around the age of 16 years. There are no known long term complications associated with Sever’s disease.