The plantar fascia is a ligament-like band running from your heel to the ball of your foot. This band pulls on the heel bone, raising the arch of your foot as it pushes off the ground. But if your foot moves incorrectly, the plantar fascia may become strained. The fascia may swell and its tiny fibers may begin to fray, causing plantar fasciitis.
This condition is commonly referred to as a “heel spur.”
Note: When your foot bears your body weight, the plantar fascia is pulled tight like a bowstring. Inflamation of this structure is the most common cause of heel pain.