Overview
The most common bursa to be inflamed in the foot is the retrocalcaneal bursa (also referred to as the subtendinous calcaneal bursa). Located between the Achilles tendon and the heel bone (calcaneus), this is a “true” bursa that is present from birth. It acts as a cushion to protect the Achilles tendon from friction against the heel bone. Also commonly affected, the subcutaneous calcaneal bursa (also referred to as the Achilles bursa), located between the Achilles tendon and the skin, sits a little lower down the ankle towards the heel than the retrocalcaneal bursa. This bursa develops as you age, an “adventitious” bursa, to protect the tendon from friction at the back of the heel.
Causes
Improper foot wear, tight shoes or shoes that do not fit properly can cause extra pressure and friction on the back of the heel. Overtime, this pressure causes irritation of the bursae that protects the Achilles tendon causing one or both to swell and become inflamed. Athletes who overtrain or runners that increase their distance to quickly are at greater risk of experiencing Achilles bursitis. With over use, the Achilles bursae and tendon can become irritated and inflamed leading to thickening of the bursae lining and wearing of the tendon. Fluid builds in the bursa when it becomes irritated causing swelling of the Achilles bursa and pain at the back of the heel.
Symptoms
Pain and tenderness are common symptoms. If the affected joint is close to the skin, as with the shoulder, knee, elbow, or Achilles tendon, swelling and redness are seen and the area may feel warm to the touch. The bursae around the hip joint are deeper, and swelling is not obvious. Movement may be limited and is painful. In the shoulder, it may be difficult to raise the arm out from the side of the body. Putting on a jacket or combing the hair becomes a troublesome activity. In acute bursitis symptoms appear suddenly, with chronic bursitis, pain, tenderness, and limited movement reappear after exercise or strain.
Diagnosis
If heel pain has not responded to home treatment, X-rays may be ordered. These images can show deformities of the heel bone and bone spurs that have developed at the attachment of the Achilles. If there is swelling and/or pain that is slightly higher and within the Achilles tendon itself, an MRI may be ordered to determine if the tendon is simply inflamed or if there is a chronic tear on the tendon. Aspiration and lab tests. If a septic bursitis is highly suspected, a doctor may perform an aspiration, removing fluid from the bursa with a needle and syringe. In addition to relieving pressure and making the patient more comfortable, it provides a fluid sample that can be tested for infection.
Non Surgical Treatment
Treatment is primarily comprised of relief from the painful activity (running). It is important that shoes do not pinch the heel. If satisfactory progress is not made during the rehabilitation, medical treatment can be considered in the form of rheumatic medicine (NSAID) or injection of corticosteroid in the bursa. Injections should be performed under ultrasound guidance to ensure optimal effect and reduce the risk of injecting into the Achilles itself. If progress is not made neither through rehabilitation nor medicinal treatment, surgical treatment can be attempted.
Surgical Treatment
Surgery is rarely need to treat most of these conditions. A patient with a soft tissue rheumatic syndrome may need surgery, however, if problems persist and other treatment methods do not help symptoms.
Prevention
You can help to prevent heel pain and bursitis by maintaining a healthy weight, by warming up before participating in sports and by wearing shoes that support the arch of the foot and cushion the heel. If you are prone to plantar fasciitis, exercises that stretch the Achilles tendon (heel cord) and plantar fascia may help to prevent the area from being injured again. You also can massage the soles of your feet with ice after stressful athletic activities. Sometimes, the only interventions needed are a brief period of rest and new walking or running shoes.
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