Achilles Tendinitis (Achillobursitis/Retrocalcaneal Bursitis)
Achilles tendinitis is an overuse injury of the Achilles tendon, which joins the calf muscles to the heel bone. Achilles tendinitis occurs when the tendon and calf has been placed under increased demand, such as in running and jumping sports.
Tendinitis is the term given to inflammation, therefore Achilles tendinitis is used to describe inflammation and irritation of the Achilles tendon, and presents as pain and inflammation just above the heel following exertion. In more chronic cases where the tendon undergoes ongoing stress, micro-tears begin to form in the tissue of the tendon.
This is known as Achilles tendinosis and may present as knotty swellings just above the heel. These are made worse by exertion, stretching the tendon or by placing direct pressure over the tendon.