Vertigo tends to be worse when you move your head. That's because it's caused by a problem with the balance mechanism in your inner ear. This balance mechanism - called the labyrinth - works through fluid which moves inside your inner ear, sending messages to your brain about your position.
This is a companion discussion topic for the original article at https://patient.info/news-and-features/what-causes-dizziness-and-when-should-you-worry