The exact cause of rheumatoid arthritis is not known. Women are two to three times more likely to develop RA than men are. Most cases of rheumatoid arthritis occur in people between the ages of 30 and 50. However, RA also may develop in young children and older adults.
In the hand, rheumatoid arthritis may cause deformities in the joints of the fingers, making movement difficult. Lumps, known as rheumatoid nodules, may form over small joints in the hands and the wrist. The inflammation can become so severe that the function and appearance of the hands can become affected. RA also may have devastating effects on other organs, such as the heart and lungs.
Juvenile rheumatoid arthritis (JRA) is a form of arthritis in children younger than 16 that causes inflammation and joint stiffness for more than six weeks. Unlike adult RA, which is chronic and lasts a lifetime, JRA is often outgrown. However, the disease can affect bone development in the growing child.
Diagnosis may be difficult in the early stages because symptoms can be very subtle. If you have four or more of the following symptoms, you may be diagnosed with RA:
- Morning stiffness that lasts longer than one hour for at least six weeks
- Three or more joints that are inflamed for at least six weeks
- Presence of arthritis in the hand, wrist or finger joints for at least six weeks
- Blood tests that reveal rheumatoid factor
- X-rays that show characteristic changes in the joints
There is no cure for rheumatoid arthritis, but proper treatment can help you live a long, productive life. Treatment may include: