When our brains feel happy, endorphins are produced and neuronal signals are transmitted to your facial muscles to trigger a smile. This is the start of the positive feedback loop of happiness. … In short, when our brain feels happy, we smile; when we smile, our brain feels happier
When you put a smile on your face, the movement of the facial muscles releases those naturally-occurring feel-good chemicals, endorphins. The small rush of endorphins trigger positive feelings and can lower stress levels and improve your mood. The smile doesn’t even have to be real to be effective.
