I understand a lot of people deal with this dizziness if they get up to fast but I think mine's worst. Like when I get up, I have a blurry vision and sometimes even total blackout, my body feels week. The back of my head feels warm and tingly, it was weird but I could still stand up and even walk. It clears out in a few seconds and I couldn't actually recall what I did during that temporary blackout. I googled it and the signs are very much alike to this disorder, called presyncope? Am I correct? Is it dangerous? Is it a brain trauma? Does it have anything to do with anxiety disorder?