The lower part of the talus fits into the heel bone (calcaneus). A bursa is a small fluid-filled sac that cushions and lubricates bones when they move. There is a bursa located at the back of your ...

At the back of your heel is a fluid-filled sac called a bursa. It cushions your Achilles tendon when it slides over your heel bone. If you overuse your ankle or foot, this bursa can become ...