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A rheumatoid factor (RF) blood test measures the amount of the RF antibody in your blood. The RF antibody can damage normal body tissue.
A high RF level can be caused by diseases like rheumatoid arthritis. It's also caused by some other conditions. Sometimes healthy people have a high level of RF.
A test for rheumatoid factor is done to help support a diagnosis of rheumatoid arthritis.
In general, there's nothing you have to do before this test, unless your doctor tells you to.
A health professional uses a needle to take a blood sample, usually from the arm.
The test will take a few minutes.
- You will probably be able to go home right away.
- You can go back to your usual activities right away.
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor if you are having problems. It's also a good idea to keep a list of the medicines you take. Ask your doctor when you can expect to have your test results.
Current as of: April 30, 2024
Author: Ignite Healthwise, LLC Staff
Clinical Review Board
All Ignite Healthwise, LLC education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.
