Osteoarthritis (OA) is a condition that usually Develops gradually, over several years, and affects a number of different joints. It used to be considered a wear-and-tear form of arthritis, but it is now thought there are many more factors than age and use that contribute to its development, including genetics, obesity and past injury. It is more common in females than males. In females, it often develops after the menopause, which can lead to it being seen as part of the ageing process, although research into this is ongoing.
