Arthritis is an Inflammation/ swelling of a joint usually accompanied by pain and frequently changes the structure of the affected body part.
It is also marked by the degeneration of the cartilage in synovial joints and in vertebrae.
Causes of arthritis include aging, obesity, overuse of abuse of joints like in sports or strenuous jobs / professions and trauma.
A very commonly known, Rheumatoid arthritis is a chronic systemic disease marked by inflammatory changes in the joints.
*Systemic: Pertaining to the whole body rather than one of its parts.