why do i keep waking up feeling so dehydrated

i drink about a liter of water a day

You need to drink a lot more than that. Approximately 60% of our bodies are made up of water. Drinking twice as much water every day as you do now will very likely solve your problem.

@rageandhate: thats not enough specially if you live in a hot or humind place.

@NigelDoes: so i should be drinking 2 liters of water? isnt that too much?
@MenzernaSF4000: the place i live is usually cold and rainy.

No, it's definitely not too much. Many people in the world are in an almost constant state of dehydration because they don't drink enough water. Don't worry about drinking too much. All that's going to do is make you have to pee a lot.🙂

@NigelDoes: i hate peeing but i'll try that thanks.

You're welcome.