Doctor insights on:
What Would Cause Someone To Black Out While Driving
See below: Is this person being treated for diabetes? If not, should be. Very high blood sugar levels can cause dehydration, passing out, coma, death. If the person is being treated, s/he may have had a low blood sugar episode from not enough food, too much medicine, more exercise than usual. Person needs to be seen asap & should not drive until diabetes is under control. ...Read more
Hello! I have had two situations now where I seem to black out while sitting, once while at the doctor's office and once while driving. Very scary.
Black out: a blackout usually implies a disturbance of brain function, either due to something wrong in the brain or due to loss of adequate blood flow through the brain. In either event UR at serious risk of unheralded recurrence with the potential for serious attendant injury including death. Stop driving or operating machinery, exposure to hostile environment EG swimming erc till diagnosed & treated ...Read more
Maybe it got hot: A person who gets overheated will automatically dilate (widen) the blood vessels in his skin so that more blood will flow to the skin. His body does this in hopes of cooling him down, just like the elephant who sends more blood to his ears to cool his body down. The person, however, feels lightheaded and may faint because there is not enough blood flowing his brain (too much blood is in the skin). ...Read more
What could cause someone to black out, fully conscious in the shower. Lasted for less than a minute. Vision came back hazily at first and then fully?
Postural Hypotension: Low blood pressure is a common cause of "blacking out" that can be benign--unless, of course, the person hits his/her head on the way down. There are many other reasons why one would black out: medications, malnutrition, stroke, low blood sugar, dehydration, diabetes, seizure, infection, fever, and more. See your doctor for a complete physical and blood work. ...Read more
Vagal reaction: The most common cause of this is due to a vagal reaction related to manipulation of the eye. Vagal reactions cause the heart rate and blood pressure to drop and can cause people to blackout. To be sure if anything else is going on, you should go see your regular doctor. ...Read moreSee 1 more doctor answer
Blacking out: Blacking out while driving can occur for many different medical problems. This can pose a public safety concern! please be evaluated by your physician if you feel that you may be experiencing black outs during driving. ...Read more
A million things: If you are passing out, becoming unconscious, that is a medical emergency and needs to be evaluated. It can be caused by strokes, heart attacks, heart arrhthmias, a blood clot to the lungs, or severe loss of fluid -dehydration or bleeding. If you mean an alcoholic blackout - not remembering what happened - alcohol does that as a toxic effect, and other rapid acting sedatives can do the same thing. ...Read more
Many things: A number of conditions can cause a sudden blackout of vision. Most of these are vascular events affecting important structions in the visual pathway, such as retinal aretery or vein occlusion, hemorrhages, and vasospasm. We see with both our eyes and our brain, and these structures require perfusion of blood for oxygen, butrition and proper function. ...Read moreSee 2 more doctor answers
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