Definition: Achilles tendinitis is a syndrome of irritation of the Achilles tendon in the ankle. The Achilles tendon is the large tendon in the back of the ankle that inserts into the heel bone (calcaneus). When individuals overuse their Achilles tendon it becomes irritated and inflamed. This inflammation can cause pain and swelling. Furthermore, this can lean to small tears within the tendon, and make the Achilles tendon susceptible to rupture.
For more information:
Achilles Tendonitis & Rupture
Also Known As: Heel Cord Injury, Achilles Heel Injury
Alternate Spellings: Achilles Tendonitis

