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An RA factor is the amount of rheumatoid factor, or proteins found in the blood that may attack healthy tissues in the human body. High levels of RA factor often signal an autoimmune disorder, but some people who have a high RA level are healthy, according to the Mayo Clinic.


A rheumatoid arthritis factor test is a simple blood test that takes only a few minutes to complete, according to Healthline. The test is performed by drawing a blood sample from a vein in the arm or back of the hand.


A normal rheumatoid factor is a result less than 40 to 60 units per milliliter, states MedlinePlus. The results of the rheumatoid factor test are sometimes reported as a titer, or the concentration of a certain substance. A normal rheumatoid factor titer is less than 1 to 80.


Ra, the ancient Egyptian god of the sun, controlled the passage of the sun across the sky. Most paintings of Ra show a man with the head of a hawk, but other representations include a man with the head of a beetle or ram.


A rheumatoid arthritis flare-up occurs when the symptoms of the condition temporarily increase in intensity, explains Practical Pain Management. These exacerbated symptoms may include swollen joints, joint tenderness, morning stiffness, fatigue or fever, notes Mayo Clinic. Rheumatoid arthritis patie


Possible causes of knee pain include arthritis, mechanical problems and injury, according to Mayo Clinic. Knee pain may develop over time when a person has a slightly misaligned kneecap.


Pain in the knee that gradually increases over time is the most common symptom of knee arthritis, according to the American Academy of Orthopaedic Surgeons, or AAOS. Difficulty extending and straightening the knee, especially after long periods of rest, is another common symptom. Arthritic knees may


The signs of knee arthritis include swelling, stiffness and pain when walking and sitting, according to the American Academy of Orthopaedic Surgeons. Patients with knee arthritis typically experience an increase in pain throughout the day, and in some cases, when changes in the weather occurs, repor


Nonsurgical treatments such as medications, lifestyle changes, physical therapy and other remedies ameliorate the pain from knee arthritis, notes the American Academy of Orthopaedic Surgeons. Surgical options include cartilage grafting, synovectomy, osteotomy, and either partial or total replacement


A high knees exercise is performed by simulating a running movement, moving one knee at a time to waist level at a quick pace. The exercise increases heart rate and burns body fat.