Why Do I Feel Giddy And Sometime Black Out For Spilt Seconds When Wake Up?


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Amanda answered
If you're also hyperventilating then it's because you have too much oxygen in your blood and not enough carbon dioxide. The overabundance can cause people to pass out, and that's why you've probably seen people breathing into paper bags when they are "freaking out". It gets to CO2 back into your system. If your blood pressure spikes enough that can make you pass out too.

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