Fainting happens when your brain doesn’t get enough blood. Dehydration, shock, too much alcohol, and even anxiety can lead to fainting. If you think you’re about to faint, lie down or put your head ...

Fainting at the sight of blood is common to many people and usually occurs without warning. Again, it is unrelated to fear or squeamishness; rather, it involves elaborate physiological mechanisms.

It may sound strange, but some people actually faint when they poop. This isn’t a joke, it’s a real medical condition called vasovagal syncope. While it doesn’t happen to everyone, those who ...

We have an update now on the science of swooning. I often swoon when I hear our theme music by B.J. Leiderman. NPR's Jon Hamilton reports on evidence that fainting can be caused by a newly discovered ...

A newly discovered pathway between the heart and brain may explain why healthy people faint. The pathway appears to carry signals from the heart's lower pumping chambers to an area of the brainstem ...

There's one simple reason behind all fainting episodes: The brain isn't getting enough blood. But there are many possible underlying causes, ranging from common, usually harmless issues to rare, ...

“Beware of fainting-fits… though at the time they may be refreshing and agreeable, yet believe me: they will, in the end, if too often repeated and at improper seasons, prove destructive to your ...

A sudden restriction of blood flow to the brain. That's how scientists have traditionally explained why people faint. But several mysteries remain: What causes someone's blood flow to spontaneously ...

While most people can use marijuana without experiencing any issues whatsoever, fainting is a side effect that has been known to happen. Some medical experts say these blackout moments can occur since ...