If you don't replenish this lost fluid, you might wake up dehydrated, which can lead to a headache. Dehydration headaches occur because of the body's response to reduced blood volume, leading to ...

If you decide to drink water, you’ll have to stumble to the kitchen. When you go back to sleep, you’ll wake up the next ...

"When you're dehydrated, your body has to work harder to regulate its temperature. This can lead to restlessness, difficulty falling asleep, and waking up feeling tired and unrested. Besides feeling ...