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Dizzy on standing up.

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Hello, I'm turning 13 this June. I've been experiencing this thing that every time I wake up and stand up from the couch, my head suddenly aches so much, I get dizzy and my eyes hurt and it black-outs for a short time. And one time, when i stood up from the couch, I suddenly fell back from the couch. And every time I stand from the couch and look outside, my eyes suddenly black out for a short time and I get dizzy. Thank you.

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Category: Family Physician-GP
 18 Doctors Online


It seems like you had an orthostatic hypotension due to dehydration. Orthostatic literally means "change with standing". On waking up, usually the body water reserves are low and hence more susceptible to orthostatic hypotension.

This occurs when you are standing upright with dehydration .Dehydration will cause decreased blood volume and increased blood in the lower part of the body. Standing also causes pooling of blood in the lower part of the body which causes decreased blood supply to the brain .This causes sequential shut down of the functions of brain which starts with hearing, sensations in the hands, nausea, dizziness and then unconsciousness.

I would recommend that you keep yourself hydrated in situation that may cause loss of fluids like outdoor sports, tanning sessions etc. If you feel that you might have an episode of hypotension, first ask for help and then sit for a while and drink water. It's very important to protect yourself from future episodes as the injury from fall can be pretty bad.

I would also recommend you to follow a strict regimen of diet and exercise so that you can condition your body to prevent future attacks of hypotensive spells.

Thank you.

Dr. John Monheit
Category: Family Physician-GP
Residecny: North Colorado Family Medicine
Medical School: The Chicago Medical Center
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