(RF) is a blood test that measures the amount of the RF antibody in the blood.
Most patients with rheumatoid arthritis
, and almost all patients with Sjogren syndrome have positive RF tests.
However, not everyone with higher levels of rheumatoid factor has rheumatoid arthritis or Sjogren syndrome.
People with the following diseases may also have higher levels of rheumatoid factor:
Systemic lupus erythematosus
Higher-than-normal levels of RF may be seen in people with other medical problems. However, these higher RF levels cannot be used to diagnose these other conditions.:
AIDS, hepatitis, influenza, and other viral infections
Certain kidney diseases
, and other bacterial infections
Leukemia, multiple myeloma
, and other cancers etc
Sometimes, people who are healthy and have no other medical problem will have a higher-than-normal RF level.
Since you don't have persistent pain and swelling in your joints and anti CCP antibodies etc are negative,other causes should be looked into.