Heel spurs (calcaneal spurs) are a painful and debilitating problem for many people. Pain and inflammation of this area may be the result of many years of wear and tear. This contributes to a weakening of the plantar fascia (the long tendon on the underside of the foot) causing inflammation. The presence of a heel spur occurs from years of calcification of the heel bone as calcium is laid down to protect the site from repeated damage. When Calcium is deposited on the outside of the bone instead of being absorbed into the bone matrix it leaves the bones porous and fragile. The spur itself may cause pain due to pressure and also from the friction and inflammation it can cause.