[Kierstin Johnson]

Kierstin Johnson  asked the Naked Scientists:
   
Why do you see spots when you get up too fast?

Kierstin

What do you think?

[techmind]

I've always been told this is due to the bloo

Kierstin Johnson  asked the Naked Scientists:
   
Why do you see spots when you get up too fast?

I've always been told this is caused by a drop in blood pressure in the head when you get up suddenly. I guess it's going to be more likely to happen if you already have borderline-low blood pressure to start with...