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  2. Rheumatoid Factor: What It Is, Test Details & Normal Range

    my.clevelandclinic.org/health/diagnostics/rheumatoid-factor

    What are symptoms of high rheumatoid factor? Which symptoms you experience vary depending on what’s causing your high rheumatoid factor level. Some people have high RF levels and never experience any symptoms.

  3. Rheumatoid factor - Mayo Clinic

    www.mayoclinic.org/tests-procedures/rheumatoid-factor/about/pac-20384800

    High levels of rheumatoid factor in the blood are most often related to autoimmune diseases, such as rheumatoid arthritis and Sjogren syndrome. But rheumatoid factor may be detected in some healthy people.

  4. RF Test: What is the Normal Range for a Rheumatoid Factor Test?

    www.rheumatoidarthritis.org/ra/diagnosis/rheumatoid-factor/index.html

    When triggered, rheumatoid factor antibodies attack the healthy tissue resulting in a variety of symptoms. Typically, these symptoms cause inflammation in the synovium – a layer of soft tissue on the inner surface of joints, eventually leading to rheumatoid arthritis.

  5. Symptoms of high RF levels. A high concentration of RF can be a sign of inflammation and autoimmune disruption. A person’s symptoms will depend on what condition accompanies the high RF...

  6. Rheumatoid arthritis - Symptoms and causes - Mayo Clinic

    www.mayoclinic.org/diseases-conditions/rheumatoid-arthritis/symptoms-causes/...

    Signs and symptoms of rheumatoid arthritis may include: Tender, warm, swollen joints. Joint stiffness that is usually worse in the mornings and after inactivity. Fatigue, fever and loss of appetite.

  7. Rheumatoid Factor: Test, Level Ranges and More - HealthCentral

    www.healthcentral.com/condition/rheumatoid-arthritis/rheumatoid-factor

    If your high RF reading is accompanied by the classic symptoms of rheumatoid arthritis like joint pain and morning stiffness, it’s still not time to panic. An RA diagnosis today is...

  8. Rheumatoid Arthritis: Causes, Symptoms, Treatments and More

    www.arthritis.org/diseases/rheumatoid-arthritis

    These symptoms are clues to RA: Joint pain, tenderness, swelling or stiffness that lasts for six weeks or longer. Morning stiffness that lasts for 30 minutes or longer. More than one joint is affected. Small joints (wrists, certain joints in the hands and feet) are typically affected first. The same joints on both sides of the body are affected.

  9. Rheumatoid Factor (RF) Tests for RA and More - Verywell Health

    www.verywellhealth.com/what-is-rheumatoid-factor-190280

    High levels of RF in your blood indicate that you may have an autoimmune disease such as RA or Sjögren's syndrome. However, not everyone who tests positive for RF has rheumatoid arthritis. RF can also be found in a small percentage of healthy people, particularly aging individuals.

  10. Understanding Rheumatoid Arthritis Signs and Symptoms - Verywell...

    www.verywellhealth.com/rheumatoid-arthritis-symptoms-8391426

    RA causes the joints to be swollen, tender, and stiff. Additional symptoms include fatigue and fever. Symptoms of RA typically come on gradually and will worsen over weeks and months. They will improve over time with treatment. This article will cover early RA symptoms, common and uncommon symptoms, flare-ups, getting a diagnosis, and more.

  11. Rheumatoid Factor Test for RA: Purpose, Procedure, Results -WebMD

    www.webmd.com/rheumatoid-arthritis/rheumatoid-factor-test

    If you have symptoms of rheumatoid arthritis, such as pain, swelling, and stiff joints, your doctor may use the rheumatoid factor blood test to help diagnose it.