0

Occasionally, when I stand up after laying flat on a bed or couch I will take a few steps and then start to have tunnel/ darkened vision, a slight headache, and sometimes lose some balance, once falling down and only keeping from hitting the ground by instinct, and then I forgot how I had left my bed for a few seconds.

While I am not to worried about this, I would like to know what might be causing this, so I can try to avoid a more serious accident. Could dehydration cause this? I have some friends who report similar experiences but others deny having them. Are some people more inclined to dizziness from this? I don't think it is from exertion or anything, as I am resonably get and recently completed a weeklong backpacking trip, although it is not something I usually do.

3
  • 3
    Although I love this question and would really like to know the answer to it, I have to tell you that it is out of scope for this site. Questions relating general health are off topic. Feb 6 '14 at 21:29
  • 1
    Agreed. It could be something as benign as what the answer suggests, orthostatic hypotension, or it could be a sign of something much more, and there is no way for someone to tell over the internet. Please see a medical professional.'
    – JohnP
    Feb 6 '14 at 22:25
  • Alright, I wasn't sure if this was on topic here either, but as I could not find any other health related Stack Exchange I thought it was best here. As it has not posed a significant risk yet, I will wait until my next routine exam to ask, but thank you!
    – The Ugly
    Feb 7 '14 at 15:34
3

When the human body goes from laying prone to standing up there is a rapid, and brief, change in blood pressure. This is the likely cause. Some people are more susceptible than others, and it's called orthostatic hypotension, or sometimes, "vertigo."

Not the answer you're looking for? Browse other questions tagged or ask your own question.