Interesting find here. I came across this searching for a reason why my left index finger is ice cold while the others are find. It started with a serious pain the other night. I felt like I had broken it, but had no injury. Then woke up several times with it feeling very cold and cold to the touch. It has been cold for several days now. I am not overly worried about it, however I am interested as to why this happens. I had issues like this as a child with all of my fingers. I was also anemic (sp?) as a child.