Rheumatoid Arthritis Center
How Fish Might Affect Your Immune Health
Another Reason to Quit: Smoking and Back Pain
Virus or Arthritis? Diagnosis Not Always Clear
Get Active for Improved Arthritis Symptoms
Rheumatoid arthritis (RA) is an inflammatory disease that causes pain, swelling, stiffness, and loss of function in the joints. It occurs when the immune system, which normally defends the body from invading organisms, turns its attack against the membrane lining the joints.
Rheumatoid arthritis has several features that make it different from other kinds of arthritis. For example, rheumatoid arthritis generally occurs in a symmetrical pattern, meaning that if one knee or hand is involved, the other one also is. The disease often affects...