You’ve heard it a million times. When it’s hot outside or you’re exercising, drink lots of water. It’s how your body stays hydrated.
But can there be too much of a good thing? In rare cases, drinking an extreme amount in a short time can be dangerous. It can cause the level of salt, or sodium, in your blood to drop too low. That’s a condition called hyponatremia.It’s very serious, and can be fatal. You may hear it called water intoxication.