It’s a strange phenomenon that has a long paper trail of recorded history, but screaming skulls are very much more than just folklore. As far back as the 17th century, there are recorded notes from most churches around Britain, that tell various stories of trying to rebury or move old relics. And instead of this being an easy task to carry out, people have experienced bad omens in the attempt, and some have even resulted in death.
The legend of the name comes from some people hearing poltergeist screams when they move the skull from its resting place. You can learn more about the one in Somerset, and the history behind the screaming skull in their church here.