Arthritis is a disease characterised by and subsequent cartilage damage in one or more . This inflammation may be the body’s response to an injury (such as a fracture), an infection (either or ), or gradual wear and tear on the joints. Arthritis is also common in the skin disease psoriasis as well as in autoimmune disorders, such as lupus rheumatoid arthritis. Symptoms include joint pain, swelling, stiffness and redness that last more than six weeks.
There are more than 100 kinds of arthritis, with many different causes. Four of the most common types are:
Septic arthritis is a less common type but can cause serious joint damage and death from overwhelming infection.
For information on other types of arthritis, visit the Arthritis Foundation.
Last Review Date: June 21, 2013