Literally, inflammation of one or more joints, usually with pain and sometimes with changes in the structure. Osteoarthritis is a chronic condition of loss in the organisation of joint cartilage, with gradual calcification of the gristle, formation of spurs, and impaired function. Rheumatoid arthritis is an auto-immune disorder, with chronic inflammation and eventual distortion of the joints; the victim experiences a lessening of good health, worsening metabolic imbalance, allergies, and general stress (emotional, physical, and dietary).