What Is a Bone Spur in the Knee

Bone spurs in the knee are outgrowths of bone that develop in joints when there is increased pressure between bones from a lack of cartilage. Bone spurs are also called osteophytes. Bone spurs (or  spurring bone ) in the knee can cause pain and limit joint mobility, which can cause trouble with doing everyday activities like walking, squatting, bending, and going up and down stairs.