I have this same issue. It's been happening everyday for the last 2 weeks ever since it got cold. It only effects my index finger on my left hand and half of the finger turns completely white. It's really scary seeing it happen. The other fingers are perfect and then I have this one ghostly white finger. About 10-15 minutes after being in the house, the color and circulation comes back, but then it turns dark read and hurts. My big toes and one of my smaller toes on my right foot have gone numb and lost circulation easily since I was 19 or 20, but never like this. They go numb if I have my socks off, but don't turn completely white. This is beyond number. It like zero blood is getting there. I have had middle back pains over the past couple weeks that seems to be coming from my spine and the very first time this happened, there was a sharp tingling in my wrist. Seems to indicate something with a nerve, but then what's up with what's going on with my toes for the last 12 years? Or maybe they are different issues? My Mom was diagnosed with Raynaud's some years ago, but it effect all of her fingers and she doesn't seem to think it's the same thing. She wanted to know if I had ever injured that finger. She said it's pretty rare for Raynaud's to effect only 1 finger. I know I should see a doctor, but I don't know what kind to see.