The Bubble-Head Charm can be used to produce a bubble around the target's head, which also provided a supply of oxygen. This made it a particularly useful spell for breathing underwater, such as during the 1994 Triwizard Tournament's Second Task, where Cedric Diggory and Fleur Delacour used it to breathe underwater. It is also useful as protection from strong or foul odours.

This spell was taught to 6th years at Hogwarts School.