Osteoarthritis (OA) is the most common form of arthritis, affecting millions of people worldwide. It occurs when the cartilage on the ends of your bones is damaged or wears down over time. Healthy cartilage helps to absorb the shock of movement and when cartilage is damaged or deficient, your bones rub together. Although OA can damage any joint in the body, the most commonly affected joints include your hands, knees, hips and spine.
- Decreased ability to move