* Use the restroom: This is probably the most common reason.
* Get a drink of water: Dehydration can wake you up.
* Check on a child: Parents often wake up to check on their children, especially if they're young.
* Deal with a pet: Pets can wake you up for various reasons, like needing to go outside.
* Can't sleep: Sometimes, you just can't fall back asleep after waking up.
* Nightmares or bad dreams: These can be very disturbing and wake you up.
* Pain or discomfort: Pain from an injury or illness can wake you up.
What about you? What do you sometimes get up in the middle of the night to do?