Can hyperventilation cause permenant brain damage?

nope
it may temporarily impair your thinking because oxygen is not getting to your brain, but essentially effects are temporary (ie. light-headedness)

Thank you very much, sir.

I believe hyperventilation occurs when somebody is stressed out.

Is this correct?

I think you need about 3 minutes, if not more, without oxygen before you stand a chance of contracting lasting brain damage. Hyperventilation is, of course, nowhere near this. You still get oxygen, just less of it.

thanks man

i will tell them

thanks so much

I find this forum to be the most helpful forum on the whole of the internet.