A bony spur, also known as a heel spur, that projects from the back or underside of the heel bone (the calcaneus).
Spurs under the sole can lead to an inflammation that causes pain, especially when walking. It feels like there is a stone in the shoe. Painful spurs can be caused by trigger points, short tendons or pressure from bad shoes or a bad walking position.
Depending on the cause the physiotherapist can treat this condition f.e. with manual therapy or dry needling.