A heel spur is a bony projection on the sole (bottom) of the heel bone. This condition may accompany or result from severe cases of inflammation to the structure called plantar fascia. The plantar fascia is a fibrous band of connective tissue on the sole of the foot, extending from the heel to the toes.
Description
Heel spurs are a common foot problem resulting from excess bone growth on the heel bone. The bone growth is usually located on the underside of the heel bone, and may extend forward toward the toes. A painful tear in the plantar fascia between the toes and heel can produce a heel spur and/or inflammation of the plantar fascia. Because this condition is often correlated to a decrease in the arch of the foot, it is more prevalent after the ages of six to eight years, when the arch is fully developed.
Causes & symptoms
One frequent cause of injury to the plantar fascia is pronation. Pronation is defined as the inward and downward action of the foot that occurs while walking, so that the foot's arch flattens toward the ground (fallen arch). A condition known as excessive pronation creates a mechanical problem in the foot, and the portion of the plantar fascia attached to the heel bone can stretch and pull away from the bone. This damage can occur especially while walking and during athletic activities.
Some symptoms at the beginning of this condition include pain and swelling, and discomfort when pushing off with the toes during walking. This movement of the foot stretches the fascia that is already irritated and inflamed. If this condition is not treated, pain will be noticed in the heel when a heel spur develops in response to the stress. This is a common condition among athletes and others who run and jump a significant amount.
An individual with the lower legs turning inward, a condition called genu valgus or "knock knees," can have a tendency toward excessive pronation. This can lead to a fallen arch and problems with the plantar fascia and heel spurs. Women tend to suffer from this condition more than men. Heel spurs can also result from an abnormally high arch.
Other factors leading to heel spurs include a sudden increase in daily activities, an increase in weight, or a thinner cushion on the bottom of the heel due to old age. A significant increase in training intensity or duration may cause inflammation of the plantar fascia. High-heeled shoes, improperly fitted shoes, and shoes that are too flexible in the middle of the arch or bend before the toe joints will cause problems with the plantar fascia and possibly lead to heel spurs.
Bone spurs may cause sudden, severe pain when putting weight on the affected foot. Individuals may try to walk on their toes or ball of the foot to avoid painful pressure on the heel spur. This compensation during walking or running can cause additional problems in the ankle, knee, hip, or back.
Diagnosis
A thorough history and physical exam is always necessary for the proper diagnosis of heel spurs and other foot conditions. X rays of the heel area are helpful, as excess bone production will be visible.
Treatment
Acupuncture and acupressure can used to address the pain of heel spurs, in addition to using friction massage to help break up scar tissue and delay the onset of bony formations. Physical therapy may help relieve pain and improve movement. The Feldenkrais method could be especially helpful for retraining some of the compensation movements caused by the pain from the spur. Guided imagery or a light massage on the foot may help to relieve some of the pain. Other treatments include low-gear cycling, and pool running. Some chiropractors approve of moderate use of aspirin or ibuprofen, or other appropriate anti-inflammatory drugs. Chiropractic manipulation is not recommended, although chiropractors may offer custom-fitted shoe orthotics and other allopathic-type treatments outlined below.
Allopathic treatment
Heel spurs and plantar fascitis (inflammation of the plantar fascia) are usually controlled with conservative treatment. Early intervention includes stretching the calf muscles while avoiding reinjury to the plantar fascia. Decreasing or changing activities, losing excess weight, and improving the fit of shoes are all important measures to decrease foot pain. Modification of footwear includes well-padded shoes with a raised heel and better arch support. Shoe inserts recommended by a healthcare professional are often very helpful when used with exercises to increase the strength of the foot muscles and arch. The inserts prevent excessive pronation and continued tearing of the plantar fascia.
To aid in the reduction of inflammation, applying ice for 10–15 minutes after activities and the use of anti-inflammatory medications, such as aspirin or ibuprofen, can be helpful. Corticosteroid injections may also be used to reduce pain and inflammation. Physical therapy can be beneficial with the use of heat modalities, such as ultrasound, that create a deep heat and reduce inflammation. If the pain caused by inflammation is constant, keeping the foot raised above the heart and/or compressed by wrapping with a bandage will help. Taping can help speed the healing process by protecting the fascia from reinjury, especially during stretching and walking.
In 2000, a number of U.S. podiatrists were experimenting with a new technology known as Extracorporeal Pressure Wave Treatment (EPWT). This technology is similar to lithotripsy, which uses sound waves to break up kidney stones. Cost of EPWT was roughly comparable to that of surgery. Initial reports from practitioners using the treatment were positive.
Heel surgery
When chronic heel pain fails to respond to conservative treatment, surgical treatment may be necessary. Heel surgery can provide pain relief and restore mobility. The type of procedure used is based on examination and usually consists of releasing the excessive tightness of the plantar fascia, called a plantar fascia release. The procedure may also include removal of heel spurs.
Expected results
Usually, heel spurs are curable with conservative treatment. If not, heel spurs are curable with surgery, although there is the possibility of them growing back. About 10% of those who continue to see a physician for plantar fascitis have it for more than a year. If there is limited success after approximately one year of conservative treatment, patients are often advised to have surgery.
Prevention
To prevent this condition, wearing properly fitted shoes with good arch support is very important. If a person is overweight, weight loss can help diminish stress on the feet and help prevent foot problems. For those who exercise frequently and intensely, proper stretching is always necessary, especially when there is an increase in activities or a change in running technique. It is not recommended to attempt to work through the pain, as this can change a mild case of heel spurs and plantar fascitis into a long-lasting and painful episode of the condition.
In 2002, researchers attempted to compare the effects of various running techniques on pronation and resulting injuries like stress fractures and heel spurs. They suggested that it is possible to teach runners to stride in such a way as to minimize impact forces. One way is to lower running speed. Another is to take longer rest periods following a run.
BOOKS
Perkins, Kenneth E. "Lower Extremity Orthotics in Geriatric Rehabilitation." In Geriatric Physical Therapy, edited by Andrew Guccione. St. Louis, MO.: Mosby Year Book Inc., 1993.
PERIODICALS
Feeny, Tracy. "If The Shoe Fits." Advance Magazine for Physical Therapists. (July 1997): 7.
Hreljac, Alan. "Technique Impacts Overuse Injuries in Runners—Research Suggests Impact Forces and Rate of Pronation Influence Risk of Injury." Biomechanics. (September 1, 2002): 51.
ORGANIZATIONS
American Orthopedic Foot and Ankle Society. 222 South Prospect, Park Ridge, IL 60068.
American Podiatry Medical Association. 9312 Old Georgetown Road, Bethesda, MD 20814.
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