Rheumatoid arthritis is an autoimmune disease that primarily attacks the synovial tissues across the joints. Autoimmune diseases cause the body’s system that is immune to mistake its own tissues for foreign invaders, like viruses or bacteria.
Rheumatoid arthritis include degenerative joint and spine diseases such as osteoarthritis. Do not confuse these wear-related joint pain, however, rheumatoid arthritis (RA) - the most common form of inflammatory rheumatic diseases. Women are mostly affected twice as often as men (see figure).