Light headed when standing up or working out?

[danielle]

So lately every time I get up, or play tennis, I get really lightheaded, and it looks like I see streaks of white when i try to blink, then it goes away, I don't know if there could be a problem or it might just be heat or head rush, I live in Texas so its hot as hell, but even when I get up from sitting and or laying down.

[Orangee crushh x]

DEHYDRATED. definiltey.
unless you hit your head.
then it could be serious
but your dehydrated from the heat.
drink more.

[thelittleinuit]

Chances are you're probably a female teenager and tall and slim. Right?
This is really really common in teenaged females, due to low blood pressure. I used to faint when I exercised, and get really light headed when I'd run up stairs or stand up quickly. It's due to all of a sudden your heart needs to pump blood a lot higher than when you were sitting/laying and it takes a few seconds to catch up and for those seconds you're light headed. There's nothing wrong with you.
Rule out the possibilities of dehydration by drinking lots of water and anaemia by eating lots of red meat or spinach (or getting a blood test) and just take it slow.

[Alvaro]

My advice is that you go immediately to your doctor. We should refrain giving advice on health problems.

Good luck.

[Str]

I get like that to. you might be dehydrated

[Dr. Phil]

you're dehydrated. drink more orange juice and water.

[scip779io]

i get this sometimes too. people said it was just cuz of my blood pressure-sugar thing. like if you have too much sugar or too little sugar this can happen. some said it was from dehydration. but its most likely dehydration. when i feel light headed, i just sit in place until the dizziness goes away and then i drink some cold water and feel better. if you still dont feel good, and this keeps happening, you might wanna get checked out by a doctor. but the cold water should help.

[Tom]

I live in Texas too, so i know how you feel. Its probably just because of the heat. Its been triple digits all week in DFW where im at, so thats probably why.

[Aliz]

I'd go with the first answer, but it could be that you are not getting enough oxygen to your brain.

Sometimes when my son played too hard, he would get to the point of passing out. The doctor said it was because he was not getting enough oxygen to his brain. A couple of chiropractic treatments cured it.

[woww]

i dont know the same thing happens to me and i live in new york where it's not that hot.