Bone spurs (osteophytes) are bony projections that form off of bones in and along joints, and are often seen with arthritis. Bone spurs can limit joint motion and can cause joint pain. Bone spurs form when the body tries to increase the surface area of the joint to better distribute weight across a joint surface that has been damaged by arthritis. To slow formation and alleviate symptoms, it has been shown that joint motion improves nutrition to the tissue and maintains the health of the joint.
Spine, 1977