What happens to your mind and body when you only get 4 hours of sleep in 24 hours?

Hi, I'm 19. I usually become very depressed, I can not concentrate, easily irritated, slow, tired, dizzy. When it is like this everyday, I lose my mind. I can no longer distinguish between reality and fantasy.

The power of sleep.
Update: Real bad stomach problems.
Update 2: I get wrinkles and my skin looks horrible.
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