Have you ever wondered what triggers an ice cream headache?

Sometimes when you eat something cold, especially ice cream, it touches the top of your mouth and initiates a nerve reaction that swells blood vessels in your head. This causes a headache that usually resolves within a minute.

To avoid “brain freeze,” the University of Dalhousie in Canada suggests you try eating frozen goodies slowly, giving the roof of your mouth time to warm up between bites.