Posted by:
sophia
(
)
Date: October 23, 2011 11:12AM
I'm not a doctor, and you should see one if this persists, but try googling "orthostatic hypotension" to see if the symptoms match what you are experiencing. Orthostatic hypotension means that when you go from a reclining position to a horizontal one, your blood pressure drops briefly. It happens to me all the time and has since I was a teenager. As I understand it, it is basically a function of gravity--blood flows downward when you sit up.
Try tightening your abdominal muscles before you stand or sit up and see if that helps. Or if you forget to do that before you stand up, do it as soon as you feel dizzy. Also, dehydration is a common cause or trigger. Some medications can cause it. If it's transient (resolves quickly), it's probably not a big deal, but you should probably ask your doctor about it.
If you google it, a lot of scary things come up, along with some not-so-scary things, and you should probably distinguish between transient orthostatic hypotension and orthostatic intolerance. Here is a link about transient orthostatic hypotension in healthy teenagers is normal.
http://www.nymc.edu/fhp/centers/syncope/orthostatic_hypotension.htmI'm guessing it's the same for adults. It has been decades since I mentioned it to a doctor, but when I did they just said to tighten my abdominal muscles before standing up.