The word arthritis means inflammation of joints.It comes from two 
Greek words, athron meaning joints and itis meaning inflammation. 
It is a chronic disease. In the early stages, the whole body is 
usually involved and one or two joints may become completely deformed,
 leaving the patient handicapped and somewhat weakened. It is mostly 
seen in the elderly. Inflammation is the main feature of arthritis, 
which is a reaction of the joint tissues to some form of damage or 
injury and it highly affects joints and bones.