1 Cold hands and Itching skin and Cold feet (10 causes). 2  Cold hands and Itching skin and Weakness (10 causes). 3  Cold hands and Itching skin and Breathing difficulties (9 causes). 4  Cold hands and Itching skin and Confusion (9 causes).
Rheumatoid factor (RF) Rheumatoid factor (RF) is a blood test that measures the amount of the RF antibody in the blood. Most of the time, blood is drawn from a vein located on the inside of the elbow or the back of the hand. In infants or young children, a sharp tool called a lancet may be used to puncture the skin.
When to Test for Rheumatoid Arthritis. The rheumatoid factor test is used to diagnose rheumatoid arthritis or Sjogren's Syndrome, and help distinguish those conditions from other forms of arthritis or other conditions that mimic or have very similar symptomatology to rheumatoid arthritis.heumatoid Factor is Made of Antibodies. If you see your primary care doctor, he or she may elect to do a blood test where they test for antibodies that are called rheumatoid factor. When rheumatoid factor is present in your bloodstream, it's a good indicator that you may be suffering from rheumatoid arthritis.