Heel spurs can appear in different locations on the heel bone. They either appear superior to the plantar fascia on its proximal insertion or extending forward from its proximal insertion within the plantar fascia (plantar spurs). On the other hand, heel spurs can sometimes appear at the back of the heel bone where the Achilles’ tendon is inserted (dorsal spur).

There is a contiguity between the plantar fascia, the Achilles’ tendon and the calf muscles. It’s articulated around the heel bone which acts like a pulley in order to transfer the forces from the sole of the foot to the back of the leg. A lack of foot support will tend to stretch excessively the plantar fascia when standing up. This excess of traction on the plantar fascia generally leads to a calcification. An accumulation of calcium salts is deposited in soft tissue, causing it to harden. The main symptom of heel spurs is a sharp pain under the heel when waking up, persisting in a dull ache throughout the day.