What Causes Rheumatoid Arthritis?
The exact cause of rheumatoid arthritis remains unknown, but several risk factors have been identified. Women are diagnosed with RA more often, and it is suspected estrogen may play a role. Several studies have shown there is a genetic component to developing RA. Cigarette smoking appears to increase the risk of developing the disease. Occupational exposure to certain dusts such as silica, wood, or asbestos can also lead to a higher risk for developing the illness. It is thought there may be a viral or bacterial infectious cause of RA but that is still being studied.
