Juvenile Idiopathic Arthritis (JIA) is a type of arthritis that causes joint inflammation and stiffness for more than six weeks in a child aged 16 or younger. It affects approximately 50,000 children in the United States. Inflammation causes redness, swelling, warmth, and soreness in the joints, although many children with JRA do not complain of joint pain. Any joint can be affected, and inflammation may limit the mobility of affected joints.
Last winter, after spending a few afternoons shoveling snow, Heather Miceli, 27, woke up in the middle of the night and couldn’t get out of bed. “My joints had swelled up so much that I couldn’t move without crying,” she says.
Two months later, the college professor at Johnson and Wales University in Providence, R.I., who had always been healthy, was diagnosed with rheumatoid arthritis (RA) -- a debilitating autoimmune disease that causes inflammation and swelling in the joints and surrounding tissues, most commonly in the wrist, fingers, knees, feet, and ankles. Other organs such as the lungs, skin, and eyes can also be affected.
Osteoarthritis is a joint disease that most often affects middle-age to elderly people. It is commonly referred to as OA or as "wear and tear" of the joints, but we now know that OA is a disease of the entire joint, involving the cartilage, joint lining, ligaments, and bone. Although it is more common in older people, it is not really accurate to say that the joints are just "wearing out."