Why do people fall when they get dizzy?
927397
The vestibular system controls equilibrium.  In short, there are labyrinths (canals or tubes) and pouches which contain fluid in your inner ear.  Cilia (tiny hairs) act as the sensors in these apparatuses.  The labyrinths sense and transduce rotation, while the otoliths (pouches) sense and transduce linear acceleration.  The signals transduced by the cilia in the vestibular system are sent to the vestibulocerebellum (or archicerebellum), a specialized portion of the cerebellum dealing with equilibrium.  The vestibulocerebellum is connected to upper motor neurons of the medial brainstem motor pathway.  The medial brainstem motor pathway ends on interneurons (relay neurons) which control alpha and gamma neurons(alpha and gamma neurons control different types of muscle) which control axial, limb, and trunk muscles.
1158624
That is called orthostatic hypotension.  Actually, it is because the blood is rushing out of your head that you are dizzy.  This can be the result of a number of medical problems, or developing problems, including anemia and hypothyroidism.  It can also have something to do with not drinking enough liquids or not enough salt.  Your diet may very well be contributing to it.\n\nNow, as for the question about splotches of white, you are indeed on the way to passing out.  The pressure sensors (called baroreceptors) trigger your heart to pump harder, but they don't always catch things in time.  It is possible to pass out from this condition.  It's best to get up slowly.\n\nTalk with your doctor about it.  This is something that should be taken care of before you get hurt with it.
923414
a balance disorder. The cause could be a number of things such as\nhigh or low BP\nneurological disorder.   \nit's purpose is to alert you that there is something going on with your body.  Keep a log of what is going on and consult your Doctor immeditaley
441647
It could be a cause of low blood pressure so try getting some sleep and rest. Eat properly. Have a right diet, because there are many causes of dizziness. Hope that helps. :)
347467
it depends on the situation.  if someone has a slow GI bleed, they can be asymptomatic and have hemoglobins as low as 5 or 6.  However if someone is acutely bleeding, a drop from 14 to 10 may cause dizziness and hypotension.  The biggest factor is if their heart rate is elevated, their blood pressure drops and they feel weak and/or dizzy.
135073
Kinda, but you can get dizzy and light headed after doing it for a long time. Try it out and see how you feel.
693724
Maybe something to do with the central nervous system winding down..Sometimes I do that and it feels weird..so your not alone...I also feel like Im fallin sometimes...its normal...no answers just normal
612109
hormone isn't secreted when you shake your head. hormones are a chemically controlled substance that don't come out on a whim. \n\ni have a feeling that neurotransmitters are the culprits. neurotransmitters are sent throughout the body, Endorphins, which make you happy, might be the cause of this. \n\nheightened blood pressure, and lack of oxygen might increase the intensity of the neuotransmitter, which would lead to intense pleasure! the rapid movements of the nerve impulse to the synpases of the nervous system are the real technical cause..\n\nmaybe you're just shaking your head too hard.. and you're feeling light-headed. with all of the blood down there, i wouldn't be surprised that the dizzy feeling is from lack of blood! \n\nenjoy!
627288
Quick answer... there are many causes, but one of them can be anemia, or internal bleeding, or the side effects of some medications. Low blood pressure can make you feel dizzy, or you can faint if you stand too quickly after sitting or lying down.
466910
are you doing anything just before or during that makes them come on?  like standing up?  a lot of dizzy spells are from low blood preasure, especially when standing up (it's called orthostatic hypotension).  also it can come from low blood sugar.   so make sure you're not getting too hungry by snacking on fruits during the day and drink plenty of water.
493399
You need to check your blood pressure. Low blood pressure may cause dizziness when you sit suddenly after waking up. Buy sea salt and use it (just keep under tongue) more often during the day. That should help a lot.
577897
If you feel like you are going to pass out, many times it is due to a sudden loss of blood pressure, like from getting up from the couch after watching a movie. \n\nYou will feel light-headed, or slightly dizzy.\nImmediately take a breath and force it slowly out.  In other words as if blowing up a strong balloon. This will tighten up your diaphragm, and raise your blood pressure, hopefully in time to prevent passing out.\n\nI have heard anecdotal stories that coughing really hard may also help.  Same principle, it creates pressure in your upper diaphragm, thus temporarily raising blood pressure.
118569
Many times it's not adrenaline that is causing someone to pass out, but rather when the body processes what happened and the brain panics, it produces insulin to try to help calm you down, many times this insulin rush is what causes people to pass out.
325765
It sounds like it may be migraine associated dizziness. It is not uncommon for people who have migraines to experience dizziness along with them.
592196
Have you got a problem with your inner ear, this can some times effect your sense of balance.
1096326
Dizziness, or vertigo, is sometimes caused by excessive motion, like a carnival ride going too fast. Your brain cannot assimilate all the sensations that are going on to help you keep your balance. So, if you eat a couple of elephant ears, a pronto pup and a burger and chase it down with a Coke, then you get on the scrambler, your brain is going to try to help you keep your balance while you are on the scrambler. You will "hurl your lunch" because your brain is busy helping your body keep it's balance. \n\nDizziness can also be a symptom of the flu or some other ailment. Throwing up can just be because your body is run down and it is rejecting the work of digesting your food because it needs to concentrate on whatever it is that is making you sick, like the flu or an infection or something.
396784
It's to keep your balance.  While you are walking, actually your body is completely off the ground for a split moment.  So, you need to keep from falling on your ass.