Heel Spurs and Bone Spurs
Heel spurs (calcaneal spurs) are protrusions (bumps) on the forward underside of the heel bone that can occur when the plantar tendon pulls excessively in the area where it attaches to the bone. The condition is often associated with plantar fasciitis, although it can also occur on its own. Heel spurs typically are not painful unless they intrude into the soft tissue (plantar fascia), where they can cause irritation that results in heel pain.
Bone spurs (retrocalcaneal spur, or exostosis) can develop not only on the back of the heel, but also on the toes, mainly around the fifth (small) toe. Most often, they occur next to the toenail on the outside of the toe; on the inside of the toe near the tip, where the fifth toe presses against the fourth toe; and on the inside of the base of the toe.
Bone spurs can also occur on the sides of the toes. This is usually due to wearing shoes that are too tight in the toe box, which causes the toes to press against each other. Bone spurs may also develop in the arch area of the top of the foot; this area becomes painful when you tie your shoelaces tightly or exert other pressure on that part of the foot. Formation of spurs in this area is often associated with arthritis.