First let's improve the question:
What could be the reason(s) for habitually waking up hungry even when hunger was satiated by eating before falling asleep.
Now an answer:
It would be easy to say the nervousness or insomnia due to nervous is the cause, and in some instance that would be true. But when it is a habit - when one is not waking and eating merely to avoid or placate some unresolved mental problem - one might ask what leads to such habit formation.
The most obvious would be that "pseudo-hunger" insomnia is a learned/inculcated - behavioral pattern (habit) - first conditioned during infancy, during which, among other times in which feeding is used to control behavior, feeding is used in an attempt to make baby stop crying and go back to sleep - mostly stop crying as quickly as possible. Because this pattern has been extended into later childhood as well as adulthood, we can say that one has been conditioned to be hungry at some phase of the sleep cycle. Conversely, because most everyone will resort to the nipple or feeding expediency, we could say that the sleep-hunger conditioned response persists mostly because the habit was not broken early on; not broken by not withholding (by failing to recognize and then wean baby from) the food "reward."
You probably need nourishment. It means that you are hungry and need to have breakfast.
Cause u didnt eat anything all night
You may be hungry because you haven't eaten for about 12 hours, or you may simply be thirsty and mistake the feeling for hunger.
Ya because they are hungry and especially in indoor cats.
Well, 5.56% is having nightmares, or not feeling safe. But if you are talking about babies they would wake up because of nightmares, not felling safe, scared of the dark or hungry.
Because you have not eaten for almost a day
chickens "cuckoo" because they are hungry, or tired... if they do it in the morning it means "WAKE UP! AND FEED ME!"
Get up
Wake up
nothing, although you may wake up hungry but you shouldn't have anything to worry about.
to get up/wake up
You mean circadian rhythms, the 24-hour cycle of living organisms. Y'know, you fall asleep at night, you wake up in the morning, you get hungry after a while. Wikipedia has a nice article on it.