A bone spur is a bony growth formed on normal bone. Bone spurs are usually caused by local inflammation, such as from degenerative arthritis or tendinitis. This inflammation stimulates the cells that form bone to deposit bone in this area, eventually leading to a bony prominence or spur. Common places for bone spurs include the spine, shoulders, hands, hips, knees, and feet. A bone spur can cause wear and tear or pain if it presses or rubs on other bones or soft tissues, such as ligaments, tendons, or nerves in the body. Follow the links below to find WebMD's comprehensive coverage about bone spurs, what they look like, how to treat them, and much more.