Like most folks here, I fly quite a bit.

On some flights, especially early morning ones, I get an unformtable/dizzy/lightheaded type of a feeling that wakes me up if I'm napping. Sometimes its quite bad that I have sit up straight for a good 15 minutes and take deep breaths to calm it down.

I'm not sure what to attribute it to... not enough sleep, dehydration, not moving around, all of the above...

Wondering if anyone else gets these and if you have an idea what could be causing it.

Thanks