Does not drinking water cause headaches?

Answer 1

Drinking too much water can cause brain swelling, which ultimately leads to a dull headache as the brain pushes against the bone. While it's (generally) not life-threatening, experts generally agree that if you are urinating more than once every two hours, you are drinking too much water.

Answer 2

you should never drink more than 2 cups of water. if you ever drink more, to prevent from passing out or getting a migrain, try hanging upside down, eating rawr eggs, or hold your breath for a few minutes.

Answer 3

Yes, dehydration can cause headaches, but headaches can also be caused by sinus pressure, lack of food, and if your prescription is not correct on your glasses.