Sometimes i get a weird blackout when i stand..

i have something like that...if i'm crouched and when i stand up i have a weird dizzy feeling kinda like what you described. probably should tell a doctor about it, lol.

I suffered from the exact thing for years. It started in early childhood, at about 9-10 years of age and continued until I was pregnant with my 1st child at age 18. That is when I found out I was anemic and simply needed to make changes in my diet and add a daily iron supplement. I am now 40 and have not had another "fade in/fade out" episode. I would suggest you see a dr for a simple blood test and evaluation of your diet.

This is kind of unusual in a young person, I think. In the elderly they caution about standing up suddenly, they call it orthostatic hypotension. Just big fancy words that mean your blood pressure drops if you stand up quickly. It would be a good idea to get other things ruled out, though, before you fall down and hit your head or something. What makes you think it is the light? It could be, I guess.

This could be because of a sudden rise or drop in blood pressure, usually it is a drop although there are conditions which indicate a rise. I suggest you discuss this with your doctor as it could be a sign of problems with your circulatory system or body's ability to regulate your blood pressure. It could also have something to do with your blood sugar levels. Hypoglycemia, which is low blood sugar and often considered to be a precursor to diabetes. Best plan is to consult your physician.

it may be due to one of so may reasons hypoglycemia as u said may be one it may also be due to anemia or possibly due to orthostatic hypotension. it may be due to too much stay in bed and lack of exercise. or possibly due to eye problems.i suggest you to consult your doctor. have a healthy living and stay happy. keep posting and goodluck

Well i'm not a Doctor to guide you properly about this, but ive heard that this happens due to Blood pressure variations.Do consult a doc and get medical advise...

I think you should go to the doctor... it is your health that is important.

I get that sometimes also. It just happens out of the blue sometimes when I stand up. It won't happen for a long long time and then one day it seems to happen all the time.

i have had that problem since i was younger the doctors all say it is nerves you can get rid of it by sitting down and putting your head between your legs that is what the dr said for me to do.

its a normal thing if you sudenly get up from a lying position. its because when you suddenly get up your body will be looking for its equilibrium too fast. take for instance you are lying down, your blood is divided equally on the side where you lie at. but when you suddenly get up blood willbe unevenly distributed, by then your blood will gush to a certain are in your body where it will find balance. or maybe you have slight depression in your blood levels... try to see your doctor and take some laboratory exmas.. take care of your health..

You are actually experiencing postural hypotension or orthostatic hypotension. The reason you feel dizzy is that because blood has pooled in your lower limbs and when you suddenly stand up the body has not immediately reacted to normalize the blood pressure. My advice, when you stand up don't walk immediately, wait for a few seconds so the body would normalize your blood pressure. But if you are always experiencing this, you might as well consult your doctor because there might be an underlying cause for your being dizzy.

U already got the answer I think. Do U already try to check Urself at hospital? I was have similar problem and they said I got something wrong in my teeth and caused my head dizzy and black out

Are you drinking enough liquids in a day?

Could be caused by a number of different things, low blood pressure could cause this, so could heart or circulation problems, you should always get this checked out by a doctor, especially if you are experiencing visual problems as well, Net Doctor at http://www.netdoctor.co.uk/ should give some advice.

yea know Lat year the same happened for me..I would get up, or just be walking and id see the room get smaller..and i did black out.fait a few times,.i went to my doctor and he did a number oftests on me..and i found i had low white cells and low sugar.and very borderline diabetic..shich im not yet im on a low diet..but i would suggest you do the same it could be notthing but exhaustingiopn or it could be serious..plz take care if your self hun

you said you're short-sighted, right? i know it sounds silly and unrelated, but this COULD be the reason. not directly, but...i am extremely near-sighted, and have astigmatism with high myopia. with such a high level of myopia (near-sightedness) i have the risk of 'flashes', loss of sight momentarily, and an eventual possibility of my retina peeling off. having myopia does affect your balance more than you'd imagine, therefore some people get dizzy, nauseous or experience quick loss of sight. i sometimes get what you explained, where it is only the visual black-out. i also get the reverse, where i seem to have a bright patch usually between my two eyes, which usually fades over a 30-minute period (so, much longer than the blackouts). i suspect this has something to do with my optic nerve, since the white-out is seen in both eyes, around the bridge of my nose. i have had damage to my optic nerve due to myopia (severe cases often cause hemorrhages), so i don't know if this is like a 'scar tissue' effect, or what exacty. i've had a brain scan but nothing weird showed up. i feel it could be a clot or tumor pressing on the optic nerve, that moves around, so it doesn't affect my sight all the time. but what you have is probably less serious. loss of blood flow like other people have already suggested....and perhaps you have a problem with your pupils. you know, pupils are basically eye muscles, that open and close according to bright or dark surroundings. do you get the same problem for example, walking out of your house into daylight? if yes, it might simply be your pupils. some people use drops to help this, but most doctors will tell you to wear sunglasses or get a pair of tinted contact lenses to diminish the contrasts of what you see. i hope some of that is helpful!

I often do this. I think sometimes it is when i stand up too quickly but it's horrible when it happens for more than 10 seconds and you wonder if your sight will come back.

Don't worry, I have that as well. It usually happens when you get up too quickly when you are lying down. What you do is to get up slowly, sit up, and then stand. It happens because there is not enough blood in your brain when you suddenly get up as your blood will be rushing downwards because of gravity and centripetal force. Give time for at least 10-20seconds for normalization. With these happens, look at your face and it will look flushed as blood rushes in.

You have not mentioned your age. Sudden blackouts are commonly seen in anemic people whose diet lacks the nutritive food. Another cause could be cervical spondylosis. It also causes such symptoms.

~ yeah i experience it to, when you sit for a long time and when you stand-up your vision blackouts, its just you have LBP low blood pressure...it nothing to worry about