I've been getting up and then will be very light headed almost to the point of p!

I've been getting up and then will be very light headed almost to the point of passing out.I know this is...

a common thing for people but it happens every time.What could this be ??

I have this happen to me a lot. However, I go through periods that it happens almost every time that I stand up. My Doctor has said MANY things about it. I have low blood pressure and get dehydrated easily. Those are my problems. I'm sorry if this sounds so "elementary", but make sure you are really hydrated all the time for the next few days and see if it helps. It may just be that your body needs more water than you used to. If that doesn't help go to your Doctor and see what he has to say. If it isn't your blood pressure then it is something else!
Hope you feel better soon!