Definition of Retrocalcaneal bursitis:

Retrocalcaneal bursitis is an inflammation of the bursa at the back of the heel bone (calcaneus). This causes pain with up-and-down movements of the foot.

Causes, incidence, and risk factors:

A bursa is a fluid-filled sac that acts as a cushion and a lubricant between tendons and muscles sliding over bone. There are bursas around most large joints in the body, including the ankle.

The retrocalcaneal bursa is located in the back of the ankle by the heel, where the large Achilles tendon connects the calf muscles to the heel bone (calcaneus).

Repetitive or over use of the ankle, for instance by doing excessive walking, running or jumping, can cause this bursa to become irritated and inflamed. This condition is commonly associated with Achilles tendonitis. Sometimes retrocalcaneal bursitis may be mistaken for Achilles tendonitis.

Those at risk for this condition include people just starting aggressive exercise regimens or having some other sudden increase in activity without proper conditioning.