More people have this condition than any other form of arthritis. It's the "wear and tear" that happens when your joints are overused. It usually happens with age, but it can also come from joint injuries or obesity, which puts extra stress on your joints.
Joints that bear weight -- such as your knees, hips, feet, and spine -- are the most common places it affects. It often comes on gradually over months or years. It makes the affected joint hurt. But you don’t feel sick or have the fatigue that comes with some other types of arthritis.