Background: 21 year old female with no history of high BP, though I do suffer from migraines. Had my yearly check-up a couple months ago and nothing wrong was found.
I've been having this issue (for a few years now) where when I lay down on my stomach after I've been sitting, I get a headache that lasts a few minutes. It's very painful, but mostly feels like a lot of pulsing pressure. I also tend to hear my own whooshing type pulse when this happens. The headache typically goes away after a couple minutes and I'm fine, but it's incredibly uncomfortable when it happens.
Does anyone have any ideas about what this could be?