An earworm is music that plays in your head on repeat. ... There are a number of triggers that can lead to earworms, the most common one is to have recently listened to the song. Other triggers include memories or thinking about associated things, or even dreaming; we can wake up with an earworm already in place.

Is it normal to always have an earworm?

So-called earworms are very common – an estimated 98% of people have experienced this phenomenon of having a tune circling persistently through their minds at some time in their lives.

Why does a song keep playing in my head?

Turns out, this phenomenon is not only common, but is due to something called an earworm. Officially known as 'involuntary musical imagery' or 'stuck song syndrome,' earworms occur when fragments of music get stuck in your head after you've heard the song.