I'm male 18.
Sometimes when I lie there relatively quietly for some time, or just sit there in the office and then suddenly get up, or when I walk straight ahead, I get dizzy for 3 - 5 seconds, I see a bit blurry and you feel like you are in this way a short film. Walking or balance is also difficult. So far I have only had black eyes, I think. I watched Netflix or something in bed and then got up relatively quickly, something went black in my eyes and I think I fell over too.
What's this?
Go to the doctor, maybe have your blood pressure checked.
Otherwise it is important to drink a lot and eat enough.
I think you don't drink enough
Not really
This is a typical effect of briefly low blood pressure. Should be over after a few moments, if not, seek medical help.