When you're tired, your brain doesn't have enough energy to feel happy. It's like when you're playing with your toys and don’t have enough batteries, everything just feels slower and sadder. Serotonin, a happiness chemical in the brain, gets used up during the day, so when you’re tired, it can be harder to feel good. That’s why people often feel sad or even moody after a long day.
Examples
- After a long day at school, you feel so tired that even your favorite snack doesn’t make you happy.
- Your brother is usually cheerful, but after working late all week, he comes home and just sits on the couch looking sad.
- You stayed up studying for an exam, now it’s hard to feel excited about anything.
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See also
- Why Do We Get Moody When the Weather Changes?
- What Causes a ‘Mood Swing’ and Why Do Some People Experience Them More Than Others?
- Why Do We Have ‘Bad Days’ and How Can We Fix Them?
- How Do Stars Affect Our Mood or Behavior?
- How Do Colors Affect Our Mood?
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