How come when I first get up, everything goes black for a moment?

Question

You know when you rub your eyes really hard for a couple seconds, open them, and everything is black for a second? Then it all comes back into view? Why does that happen when I first get out of bed everything morning? If I get up and start walking it happens.

Answer 1

Its a rush of blood going in your head, normally after staying in a position for too long. Its caused by malnutrition and/or lack of sleep. Try breathing slowly before getting out of the bed. I have this "black out" too often

Answer 2

Because when you get up suddenly, all the blood starts pooling away from your head.  This may cause you to feel a little lightheaded or have blurred vision for a few moments.  Soon the blood circulates normally again.

Answer 3

Your blood pressure is usually low after lying down and sleeping. Getting up to a standing position causes the blood to flow more rapidly and will sometimes cause dizziness, blurred vision or "black".

As long as the "normal" comes back in a few seconds, then you will be fine.

Answer 4

That used to happen to me from time to time.  I think it has something to do with an iron definciency.  From what I gather, it seems as though after sitting for a long time, standing up quickly kind of robs your brain of blood (oxygen) for a few seconds.   I think, anyway.  I'm not an expert on the subject or anything though.