What is Collective Hysteria?

What is Collective Hysteria?

WBEZ brings you fact-based news and information. Sign up for our newsletters to stay up to date on the stories that matter.
Throughout the history of the world, there have been many cases of what is known as collective hysteria - groups of people, usually young women, who all exhibit the same physical symptoms of non-existent conditions. Is it psychosomatic? Is it group think?