Hi, I would like to know why sometimes my hands turn Blue and cold, I have been told that my hands are like that because they are "bloodless". The problem is that my hands do that only in the winter. My friends and I joke that they are dead, because sometimes they are so blue and cold that they seem like they are going to fall off, on the other hand(no pun intended) I feel nothing, I don't feel cold or some kind of pain. I'm getting these also when I am dressed warmly. Can someone please tell me why is this happening and why only in winters?