There is a thick walled fluid filled bursa between the Achilles tendon and the calcaneal bone. The color Doppler images show hypervascularity of the bursal wall. A minimal amount of fluid in the retrocalcaneal bursa can often be found. A retrocalcaneal bursitis is caused by friction of the Achilles tendon over the upper part of the calcaneal bone. It is often an overuse injury found in athletes.
Repetitive overuse injury of the ankle during long periods of running and or walking. Tight shoes. The heel counter of the shoe constantly rubbing against the back of the heel. Wearing shoes with a low cut heel counter. Abnormal foot mechanics (abnormal pronation). Poor flexibility. Inappropriate training.
Pain when activating the Achilles tendon (running and jumping) and when applying pressure at the point of attachment of the tendon on the heel bone. Contrary to the tenderness occurring with inflammation of the Achilles tendon, the tenderness is localised to the point of attachment to the heel bone.
Gram stain. A lab test called a Gram stain is used to determine if certain troublesome bacteria are present. Not all bacteria can be identified with a Gram stain, however, so even if the test comes back negative, septic bursitis cannot be completely ruled out. White blood cell count. An elevated number of white blood cells in the bursa's synovial fluid indicates an infection. Glucose levels test. Glucose levels that are significantly lower than normal may indicate infection.
Non Surgical Treatment
Physiotherapy treatment is vital to hasten the healing process, ensure an optimal outcome and reduce the likelihood of injury recurrence in all patients with retrocalcaneal bursitis. Treatment may comprise soft tissue massage (particularly to the calf muscles), joint mobilization (of the ankle, subtalar joint and foot), dry needling, electrotherapy (e.g. ultrasound), stretches, the use of heel wedges, the use of crutches, ice or heat treatment, arch support taping, the use of a compression bandage, exercises to improve strength, flexibility, balance and core stability, education, anti-inflammatory advice, activity modification advice, biomechanical correction (e.g. the use of orthotics), footwear advice, a gradual return to activity program.
Surgery. Though rare, particularly challenging cases of retrocalcaneal bursitis might warrant a bursectomy, in which the troublesome bursa is removed from the back of the ankle. Surgery can be effective, but operating on this boney area can cause complications, such as trouble with skin healing at the incision site. In addition to removing the bursa, a doctor may use the surgery to treat another condition associated with the retrocalcaneal bursitis. For example, a surgeon may remove a sliver of bone from the back of the heel to alter foot mechanics and reduce future friction. Any bone spurs located where the Achilles attaches to the heel may also be removed. Regardless of the conservative treatment that is provided, it is important to wait until all pain and swelling around the back of the heel is gone before resuming activities. This may take several weeks. Once symptoms are gone, a patient may make a gradual return to his or her activity level before their bursitis symptoms began. Returning to activities that cause friction or stress on the bursa before it is healed will likely cause bursitis symptoms to flare up again.