Eli5: what happens to our body when we “look” tired? Why our eyes and face slightly change?
In: Biology
When you’re sleep-deprived or fatigued, your body produces more cortisol (the stress hormone), which can break down collagen and cause puffiness or dark circles. Your muscles, especially around your eyes, might be more relaxed and droopy, making you look tired. Plus, dehydration can make your skin look duller. Fun times, right?
The muscles in your body are fatigued, including the ones in your face. It takes energy to appear alert and reactive in your face. When you’re tired, the muscles in your face are moving slower, or not at all. Humans are really good at noticing patterns and cues in someone’s face. So even really small things can make a face appear tired.
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