If I get in a bath tub full of hot water and hold the bathroom window shut, after a few minutes I start feeling like fainting and see black before my eyes. Why does this happen? Can heat and humidity reduce blood pressure? A doctor once measured my blood pressure when I was feeling like this and the systolic was only 80! Everything was going black before my eyes and I nearly fainted that time.
Anyway, I am not looking for solutions to prevent this, because keeping the bathroom window open and using lukewarm water is enough. But I'm really curious, how does this happen?
2007-10-25 03:43:57 · 4 answers · asked by 234567877543224578 3 in Health ➔ Other - Health
the heat dilates your blood vessels and gravity pulls the blood to the lowest points on your body, depriving your brain of enough oxygenated blood to maintain consciousness. This is most often secondary to borderline dehydration, it would likely go away entirely if you drank enough water in any given day, the body requires 2 liters minimum to function efficiently.
2007-10-25 03:57:16 · answer #1 · answered by essentiallysolo 7 · 1⤊ 0⤋
I get this when I go to the high end tanning booths (like over 12,000watts). I think the quick shift in temperature bakes my brain. I think your brain is a delicate thing that needs to be in relative stability to be happy. Getting hit with high heat is probably no better for it than getting punched.
After an event like this do you have a headache or feel disoriented for an hour or so?
Either that or its viscodialation, which heat definitely does do, but usually only for superficial blood vessels.
They're uneducated guesses, but the best I've got.
2007-10-25 03:55:50 · answer #2 · answered by Anonymous · 2⤊ 0⤋
The reason you feel giddy, especially if you stand up after sitting for a while is your BP. It is a little low which causes the blood to be pushed down from your brain as you stand up. The heart is not strong enough to keep it level. Seek medical assistance and have it check again. You may need medication. It could also the result of an illness. See you GP
2016-05-25 19:46:35 · answer #3 · answered by ? 3 · 0⤊ 0⤋
Steam affects the respiratory system. We breathe very fast. When we breathe fast blood pressure also goes down. People who have high blood pressure they are advised by doctors to do brisk walking as it brings blood pressure down. You might have felt that we breathe fast when we bathe in steam.
2007-10-25 03:58:41 · answer #4 · answered by ashok 4 · 2⤊ 0⤋