An outbreak of fatal dancing fits among members of the same
community, men suddenly gripped by the sickening fear of losing their
genital organs, and teenagers having mysterious symptoms after watching
an episode of their favorite TV series — these are all instances of what
we often refer to as “mass hysteria.”
overhead shot of crowd
What is mass hysteria, and how does it manifest? We investigate.
“They danced together, ceaselessly, for hours or days, and in wild
delirium, the dancers collapsed and fell to the ground exhausted,
groaning and sighing as if in the agonies of death. When recuperated,
they […] resumed their convulsive movements.”
This is a description of the epidemic of “dancing plague” or “dancing
mania” as given by Benjamin Lee Gordon in Medieval and Renaissance
These events were spontaneous outbursts of uncontrollable dancing
motions that gripped people in communities across Europe in the Middle
Those affected would often reportedly be unable to stop dancing until
they were so worn out and exhausted that they died. These events are
typically cited as some of the first known instances of what would come
to be referred to as “mass hysteria.”
Mass hysteria is a phrase that is used so often and so imprecisely to
refer to anything from giving in to fashion fads to participating in
riots and raves that it has become something of a fluid concept,
synonymous with anything with a negative connotation that involves the
participation of a large group of people.
However, though sometimes contested as a useful, valid concept, mass
hysteria — in its more restrictive sense — lives at the intersection of
psychology and sociology.
As such, it has received some rigorous attention from specialists over the years.
What is mass hysteria?
In order to provide a clearer definition of mass hysteria, to outline it
as an event of potential clinical interest, and to distance it from any
unduly negative connotations, researchers have actually advised
referring to the phenomenon as “collective obsessional behavior.”
Specialists who have taken an interest in this phenomenon say that it
is a type of “psychogenic illness” — that is, a condition that begins
in the mind, rather than in the body. Physiological symptoms, however,
are often not illusory but very much real.
Mass hysteria is also described as a “conversion disorder,” in which a
person has physiological symptoms affecting the nervous system in the
absence of a physical cause of illness, and which may appear in reaction
to psychological distress.
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Because mass hysteria, or collective obsessional behavior, can take so
many different forms, it is very difficult to provide a clear definition
for it, or to characterize it with confidence.
In a seminal article he published on this topic, Prof. Simon Wessley —
from King’s College London in the United Kingdom — also notes that mass
hysteria has been used to describe such “[a] wide variety of crazes,
panics, and abnormal group beliefs” that defining it is particularly
Still, he suggests that in characterizing a phenomenon as an instance
of mass hysteria, we should aim to guide ourselves by five principles:
that “it is an outbreak of abnormal illness behavior that cannot be explained by physical disease”
that “it affects people who would not normally behave in this fashion”
that “it excludes symptoms deliberately provoked in groups gathered for
that purpose,” such as when someone intentionally gathers a group of
people and convinces them that they are collectively experiencing a
psychological or physiological symptom
that “it excludes collective manifestations used to obtain a state of
satisfaction unavailable singly, such as fads, crazes, and riots”
that “the link between the [individuals experiencing collective
obsessional behavior] must not be coincidental,” meaning, for instance,
that they are all part of the same close-knit community
Prof. Wessley also believes that mass hysteria should not be confused
with “moral panic.” This is a sociological concept that refers to the
phenomenon of masses of people becoming distressed about a perceived —
usually unreal or exaggerated — threat portrayed in catastrophizing
terms by the media.
Different types of mass hysteria?
In his article, Prof. Wessley goes even further, arguing that — based on
the instances of mass hysteria documented in specialized literature —
this phenomenon actually refers to two “syndromes” with somewhat
He calls these two types of collective obsessional behavior “mass anxiety hysteria” and “mass motor hysteria.”
The first kind, he says, is marked by physiological symptoms
consistent with those experienced in the case of anxiety. These can
include: abdominal pain, chest tightness, dizziness, fainting,
headaches, hyperventilation, nausea, and heart palpitations.
The second kind of mass hysteria, on the other hand, is characterized
by seizure-like events (pseudoseizures), apparent partial paralysis
(pseudoparesis), or other symptoms that alter a person’s motor function
in a specific way.
Are women most affected?
Medical sociologist Robert Bartholomew has reviewed some of the most
prominent cases of mass hysteria in his book Little Green Men, Meowing
Nuns and Head-Hunting Panics.
woman with broken mirror
Are women more likely to be affected by collective obsessional behavior?
His research seems to indicate one thing: that instances of mass hysteria are most prominently experienced by groups of women.
But why would that be the case? And does it mean that women are
somehow “hardwired” to fall prey to such mass “epidemics?” Some
researchers argue that women may be more exposed to collective
obsessional behavior because they are typically exposed to more
Physical symptoms of disease could provide a nonconfrontational way
out of an overwhelming situation. Bartholomew notes, for example, that
in a stressful or even abusive work context, mass hysteria and its
accompanying symptoms can provide a means of putting up resistance and
forging a way out.
Similarly, Christian Hempelmann — from Texas A&M
University-Commerce — who has taken an interest in mass hysteria,
suggests that these group manifestations are effective and
“The way […] to get out of [an oppressive situation] is to show
symptoms of disease and to be allowed not to have to endure the
situation any longer,” he believes.
However, the word “hysteria” itself is fraught with problems and has a
“bumpy,” highly controversial history. It is derived from the Greek
word “hystera,” meaning “uterus,” thereby attaching the condition
specifically to women.
Uses of the word have historically been so imprecise, and the term
has gained such negative connotations — used to describe any violent
outburst of emotion — that it was “retired” by the American Psychiatric
Association in 1952.
“Hysteria” is no longer used to describe any existent psychological
condition, and more specific terms are instead employed to refer to a
wide range of conditions that fell, in the past, under the large
umbrella of this name.
As a consequence of this, any claims that mass hysteria could be a
phenomenon that applies most prominently to women becomes questionable,
especially considering the heterogeneous nature of such events and how
difficult it is to categorize them.
Recent instances of mass hysteria
Though occurrences of mass hysteria have been documented throughout
history, they do not seem to have become less common with the passage of
time and the advent of technology that supports the rapid flux of
A number of intriguing events involving collective experiences of
psychological and physiological symptoms have been referred to as
instances of mass hysteria over the past 50 years or so. And some of the
most recent occurrences have even been tied to the perils of social
Laughter epidemics and penis panics
In 1962, in a village in Tanganyika — now Tanzania — a girl at a
boarding school suddenly started laughing…and was unable to stop. Her
laughing fit quickly produced a “laughing epidemic” among her
schoolmates, which became of such magnitude that the school had to be
A ‘laughing epidemic’ that started in a school in 1962 ‘eventually spread to the larger population.’
Upon sending all the girls home, the epidemic spread to the wider
community, and it only began to fade after 2 years from the start of the
Notoriously, in Singapore in 1967, hundreds of men became convinced
that eating pork meat taken from a series of vaccinated pigs would lead
to penis shrinkage or disappearance, and potentially death.
This “penis panic,” or “koro,” required a concerted effort from the
country’s government to educate the male population about their genital
organs to convince them that their conviction was not, and could not, be
In autumn 2001, children in elementary and middle schools across the
United States experienced a strange symptom: their skin would break out
in rashes, but only while they were in school. At home, their symptoms
would promptly disappear.
In the media, this phenomenon was linked to the impact of the tragic
events of September 11, and the children’s symptoms were taken as a mass
psychosomatic reaction to the feelings associated with trauma that
permeated the U.S. at the time.
The impact of mass media and social media?
More recently, in 2006, teenagers in Portugal started to present to hospital with dizziness, rashes, and breathing difficulties.
phone illustrating social media concept
Nowadays, social media may contribute to the spread of collective obsessional behavior.
After the doctors could find no physical cause for these symptoms, some
investigative work found an intriguing parallel: these were the same
symptoms that were experienced by a character in a popular soap opera
for young people, Strawberries With Sugar (Morangos com Açúcar, in
This is why the phenomenon came to be known as the “strawberries with sugar virus.”
Finally, the most fresh instance of alleged mass hysteria took place
as recently as 2012, when teenage girls from the small town of LeRoy,
NY, started to exhibit symptoms similar to those seen in Tourette’s
syndrome — such as uncontrollable jerks of the limbs and verbal
outbreaks — though the doctors were unable to find a clear cause for
This epidemic started when a girl posted a video of herself on
YouTube, in which she documented an episode of such symptoms. Until
recently, this girl had shown no sign of Tourette’s.
The video went viral, and many more teenage girls started to display
the same symptoms. A teenage boy and a 36-year-old woman were also
When the woman explained that she started having these symptoms after
she learned of the girl’s story on Facebook, this led to speculation
about social media’s potential role in advancing mass hysteria in the
So, is mass hysteria an epidemic of the mind, leading to symptoms in
the body, which is spread via social contact? This question is still
under debate, but if it is so, the advent of social media is a likely
vehicle for the spread of such “viruses.”
In any case, instances of reported mass hysteria do highlight one
consideration: that it is just as important to preserve our inner
well-being as it is to look after our physical health.
And the messages we ingest — through what we read, watch, or hear — may affect our well-being in unsuspected ways.
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