It sounds like you may be dealing with something called Raynaud's phenomenon. Raynaud's phenomenon is a condition in which the blood vessels in the hands or feet periodically constrict, usually provoked by cold temperatures. This leads to temporary loss of adequate blood flow to the fingers or toes, leading to a white color and a stinging pain. Sometimes the fingers or toes will then turn blue before returning to a normal color as the blood vessels open back up.
Although Raynaud's phenomonen can be an isolated and relatively benign finding in some people, it would be unusual for it to develop suddenly at your age. Therefore, it is imperative that you consult with your doctor
about this. This is because many cases of Raynaud's phenomenon are actually associated with a connective tissue disease or other underlying medical problem. The fact that you have arthritis
also goes along, potentially, with a connective tissue disease.
Your doctor will want to perform a thorough medical examination and may also decide to order bloodwork. They will also be interested in any other concerning symptoms you are having, such as stiffness or tightness of the skin, trouble swallowing, and swelling in your joints.