I have pretty mild reactions that kick in after I am out of the cold and back inside. That's when fingers 2, 3, and 4 go numb and white for about 0.5 hour. Then it goes away. I just can't try to eat when it happens. The doc called my level Reynaud's phenomenon or syndrome, not Reynaud's disease.

Happens whether or not I wear gloves, hat, etc. Also, it tends to happen at what I consider to be milder cold temps, between about 30-40. I can't think of a reaction after being out in teens and 20s temps. It's a very weird circulatory response. I started noticing it about a year after I had some pretty severe cold damage (not frostbite, but close) to my hands.

My reaction isn't that severe, so I just deal with it. It doesn't last, so it's more of a pain in the butt than anything.