light headed

Question by mariaespinoza Reward: 25 Pond Points + 10 Knowledge Tokens Status: Pending a resolution
why would a person get light headed and dizzy like almost about to pass out while getting up from siting down?



Reply from Dave User Rating:  84 Knowledge Tokens
It's caused by a temporary lack of blood flow to the brain.
The most common cause is called orthostatic hypotension where blood pressure drops when you stand up suddenly after a long period of sitting.

Here's some more info about it:
http://www.dizziness-and-balance.com/disorders/medical/orthostatic.html
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