Osteoarthritis occurs when the cartilage that cushions the ends of bones in your joints wears down over time. The smooth surface of the cartilage becomes rough, causing irritation. Eventually, if the cartilage wears down completely, you may be left with bone rubbing on bone — causing the ends of your bones to become damaged and your joints to become painful.
In most people, it is often not clear what has caused the osteoarthritis
Some of the causes may include:
- The aging process
- Joint injury or stress
- Muscle weakness