I don't see how it can be anything but a blood circulation problem, and or nerve malfunctionality. Raynaud's is a disorder that affects the blood vessels in the fingers, toes, ears, and nose. This disorder is characterised by episodic attacks, called vasospastic attacks, that cause the blood vessels in the fingers and toes to constrict and reduce blood flow.
Excess sugar in your blood (diabetes)can lead to nerve damage. You may notice tingling and loss of sensation in your hands and feet, as well as burning pain in your arms, hands, legs and feet.
Worst case scenerios and you should see your doctor and get a medical opinion and tests to rule out.