I was diagnosed with reynauds syndrome. I have no feeling in my middle finger when it gets cold. I have to keep my core temp. warm especially in the winter. Dr's do not know what causes this. Majority is in women and it could poss. go to my other fingers or toes. My finger turns blue. Drs say it has to do with the blood flow in my arm. Something is restricting the blood flow to my finger. Does anyone out there suffer from this?