Rheumatoid arthritis (RA) is an autoimmune disease. It causes pain, swelling, stiffness, and loss of function in the joints.
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RA is caused by a combination of genetic and environmental factors that trigger an abnormal immune response. Possible causes include:
- Genes—People with rheumatoid arthritis may have a specific genetic defect that increases their risk for developing this condition.
- Defects in the immune system may cause the immune cells to fail to recognize the body’s own tissues.
- Infection with specific viruses or bacteria that kick off an abnormal immune response.
- Chemical or hormonal imbalances in the body.
Last reviewedJune 2013by Fahran Tahir, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.