What is Arthritis?
Arthritis affects the musculoskeletal system, specifically the joints. It is the main cause of disability among people over fifty-five years of age in industrialized countries.
The word arthritis comes from the Greek arthron meaning "joint" and the Latin itis meaning "inflammation". The plural of arthritis is arthritides.
Arthritis is not a single disease - it is a term that covers over 100 medical conditions. Osteoarthritis (OA) is the most common form of arthritis and generally affects elderly patients. Some forms of arthritis can affect people at a very early age. Types of arthritis
There are over 100 types of arthritis. Here is a description of some common ones, together with the causes: