Osteoarthritis is a chronic joint condition characterized by the breakdown and eventual loss of cartilage in the joints. It's the most common form of arthritis, often impacting hands, knees, hips, and spine.

As the cartilage deteriorates, bones begin to rub against each other, which can result in pain, swelling, and reduced joint mobility. Osteoarthritis typically worsens over time and can significantly affect quality of life.