It might be found in the knees, hips, or any other joint. In the spine, osteoarthritis can affect the facet joints, which enable the body to bend and twist. As these joints deteriorate, cartilage may become inflamed and start to fray like a well-used rag. The fraying process may cause pieces of cartilage to break away from the joint surfaces. As the joints are stripped of their cartilage, the once smooth, slick surfaces designed for friction free movement are lost.
Joint bones begin to rub together creating friction while trying to work.
The nerve structures in the joint become sensitized, irritated, and become inflamed presenting pain. In the spine, the bony spurs may cause the disc space to narrow. When this happens, the associated vertebral disc may collapse, compromising its integrity.