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.
About half of all people with rheumatoid arthritis have a positive rheumatoid factor present in their blood when the disease starts, but about one in every 20 people without rheumatoid arthritis also tests positive for this.Another antibody test known as anti-CCP (anti-cyclic citrullinated peptide) is also available.bout half of all people with rheumatoid arthritis have a positive rheumatoid factor present in their blood when the disease starts, but about one in every 20 people without rheumatoid arthritis also tests positive for this.