Arthritis

From Conservapedia

Arthritis is a medical condition characterized by inflammation of the joints which results in pain and difficulty moving.^[1] Arthritis is a common condition among the eldery. Over time, a swollen joint can become severely damaged. Some kinds of arthritis can also cause problems in your organs, such as your eyes or skin.

One type of arthritis, osteoarthritis, is often related to aging or to an injury. Other types occur when your immune system, which normally protects your body from infection, attacks your body's own tissues. Rheumatoid arthritis is the most common form of this kind of arthritis. Juvenile rheumatoid arthritis is a form of the disease that happens in children.^[2]

References

1. ↑ http://www.cdc.gov/vaccines/about/terms/glossary.htm#a
2. ↑ http://www.nlm.nih.gov/medlineplus/arthritis.html