I have Raynauds too. My finger tips sometimes just go suddenly white on one or two fingers. It is very hard to get change out of my wallet, or bills, or my credit card when this happens. The weather is usually on the cool side, but not always; sometimes if the A/C in the store is set too low for me, it can trigger the white fingers. At night my feet usually get very cold once I lay down in bed--it's something about being horizontal I think.