Bone Spurs
After an injury or when facet joint cartilage wears away and bone rubs against bone, the body may add bone to the damaged area in an effort to support the vertebral column. Bone spurs (osteophytes) form on the ends of bones, especially in the facet joints where bones meet. Symptoms include dull pain in the neck or low back, pain that radiates into the shoulders, pain that radiates into the buttock and thigh, pain that worsens with activity, and stiffness.
Arthritis 
