what kinds of arthritis is there
Types of Arthritis. There are more than 100 different types of arthritis. Some of the more common types include: 1  Osteoarthritis. 2  This is the most common type of arthritis. 3  It occurs when the cartilage covering the end of the bones gradually wears away.
Rheumatoid arthritis (RA) is an autoimmune disease that causes inflammation of the joints. Because many symptoms of RA are similar to those of a variety of other diseases, diagnosis can be difficult. A correct diagnosis requires clinical evaluation, X-rays, and a series of laboratory tests.