Why does music give you goosebumps?Your brain gets a hit of pleasure from surprise.

From the show

Science Around You

Ever get a sudden chill while listening to a song? That physical reaction, called frisson, is a fascinating trick your brain plays on itself. It happens when a song violates your expectations, like with a sudden change in volume or a new instrument joining in. This surprise triggers a mild 'fight or flight' response, but your brain quickly realizes you're safe and rewards itself with a rush of dopamine, the pleasure chemical. It’s a tiny, self-induced emotional rollercoaster.