Why do I get dizzy when I'm tired?

Question

When I don't get enough sleep, I get dizzy and lightheaded, and the more sleep-deprived I am, the worse it gets. It doesn't take an awful lot of missed sleep to produce this - this week I had three nights in a row of getting about 6 hours sleep, and the first night I got mildly dizzy later in the evening, but the day after the third I felt lightheaded all day just sitting at my desk at work, and the same the day after that although I'd had 8 hours.

I was advised it might be low blood sugar, so have been very careful to eat enough and eat well, but it's made no difference.

My doctor just says that tiredness shouldn't cause dizziness - that's a lot of help! - so if anyone can tell me why this happens, and if there's anything I can do to alleviate it (besides getting more sleep) I'd be grateful.

Answer 1

In theory dizziness could be due to disorder of many parts of the brain, but in practice I think most if not all is triggered from the inner ear (vestibular labyrinth). The organ of balance works by movement of fluids, so is very susceptible to changes in fluid distribution, as with alcohol or hangover. Check carefully for any associated symptoms of Meniere's disease, however slight and temporary (fluctuant hearing, blocked ear, sensitivity to noise, tinnitus) to confirm its aural origin. If so, you could try drinking more water.

Answer 2

Low blood sugar - yes, but that is just the beginning of your problems. You have to go into further details. In my opinion, go visit your doctor again, and ask about your white blood cells. You could have diabetes.
You getting dizzy before bed time could be your brain letting you know it wants to rest. It could be the way you sleep. Do you have a particular way that you sleep, or do you practice some form of yoga or something where the blood flows quickly to your head?
In any terms you have to study what is going on when you are getting dizzy.
I've been running for almost eleven years now, and I know when I've pushed myself to the limit in a race because afterwards I get completely dizzy and sometimes pass out.
However with your body its just...a lack of energy?
Dizziness is your body being unbalanced, your whole sense of your surroundings go off. Why would this happen over something small as lack of sleep?
It may be more serious, but I think it could be diabetes.

Answer 3

Dizzy When Tired

Answer 4

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Answer 5

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Answer 6

by best guesses is that you are dehyadrated, are not taking care of yourself as well as maybe being anemic. i am in the same shoes like you but i am getting 3 hours a night 4 times a week on average. or otherwise your body is used to getting the 8 or more hours of sleep so you broke that cycle therefore you are most likely anemic or not taking good care of yourself! go and have some tests done and see if you really are anemic and if you are talk to your doctor about how to overcome this and what to do to help.

Answer 7

It could be a number of things, but the two that most come to mind are dehydration (can make you quite woosy) and if you have poor circulation, you could have trouble if you stand up very quickly. You could be iron deficient or even have an ear infection. Your doctor should have taken some blood to find out the root of the problem.

Answer 8

In my experience, it's caused due to a lack of oxygen which is unable to circulate the blood around your body, in particular, your head. Try and do some light exercise during the day and get some fresh air in to your lungs.

Answer 9

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Answer 10

Perhaps it is due to the fact that your brain is loosing oxygen due to a slower heart rate. Try turning on lots of lights and listening to medium-to-soft volumed music to stay awake longer!