what causes osteophytes
Bone spur facts. 1  A bone spur (osteophyte) is a tiny pointed outgrowth of bone. 2  Bone spurs are usually caused by local inflammation, such as from degenerative arthritis or tendonitis. 3  Bone spurs develop in areas of inflammation or injury of nearby cartilage or tendons. 4  Bone spurs may or may not cause symptoms.