Why does your body need sleep to feel good?
Brain's Night Shift
Why does your body need sleep to feel good?
You know that feeling when you've been awake too long? Your thoughts get fuzzy, your eyes feel heavy, and even easy things seem hard. Your body isn't being dramatic — something real is happening inside your brain, and it's been happening since the moment you woke up this morning.
While you're awake, your brain is working like a busy factory. Every thought you think, every word you read, every face you see — all of it creates tiny chemical messengers called adenosine. Adenosine piles up in your brain like dishes in a sink. The longer you're awake, the higher the pile grows.
