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1. Blackburn faintings (1965) – In October 1965, several girls at a girls' school complained of dizziness in Blackburn, England. Some fainted. Within a couple of hours, 85 girls from the school were rushed by ambulance to a nearby hospital after fainting. Symptoms included swooning, moaning, chattering of teeth, hyperpnea, and tetany. A medical analysis of the event about one year later found that outbreaks began among the 14-year-olds, but that the heaviest incidence moved to the youngest age groups. There was no evidence of pollution of food or air. The younger girls proved more susceptible, but disturbance was more severe and lasted longer in the older girls. Using the Eysenck Personality Inventory, those affected had higher scores for extroversion and neuroticism. It was considered that the epidemic was hysterical, that a previous polio epidemic had rendered the population emotionally vulnerable, and that a three-hour parade, producing 20 faints on the day before the first outbreak, had been the specific trigger.

2. In May 2006, an outbreak of the so-dubbed Morangos com Açúcar Virus ('Strawberries with Sugar virus') was reported in Portuguese schools, named after the popular teen girl's show Morangos com Açúcar ('Strawberries With Sugar'). At least 300 students at 14 schools reported similar symptoms to those experienced by the characters in a then recent episode where a life-threatening virus affected the school depicted in the show. Symptoms included rashes, difficulty breathing, and dizziness. The belief that there was a medical outbreak forced some school to temporarily close. The Portuguese National Institute for Medical Emergency eventually dismissed the illness as mass hysteria.

3. Mexico City (2006–2007) – Between October 2006 and June 2007, near Chalco, a working-class suburb of Mexico City, mass hysteria resulted in an outbreak of unusual symptoms experienced by more than 500 adolescent female students at Children's Village School (Villa de las Ninas), a Catholic boarding-school. The affected students had difficulty walking and were feverish and nauseated, some becoming partially paralyzed.

4. Mexico City (2006–2007) – Between October 2006 and June 2007, near Chalco, a working-class suburb of Mexico City, mass hysteria resulted in an outbreak of unusual symptoms experienced by more than 500 adolescent female students at Children's Village School (Villa de las Ninas), a Catholic boarding-school. The affected students had difficulty walking and were feverish and nauseated, some becoming partially paralyzed.

5. Vinton, Virginia (2007) – An outbreak of twitching, headaches and dizziness affected at least nine girls and one teacher at William Byrd High School. The episode lasted for months amid other local public health scares.

6. Tanzania (2008) – In September 2008, 20 girls at a school in Tabora started fainting while taking their final year exams. The mass fainting has been linked to neurosis related to the local practice of witchcraft

7. Afghanistan (2009–) – Starting around 2009, a spate of apparent poisonings at girls' schools across Afghanistan began to be reported, with symptoms including dizziness, fainting, and vomiting. The United Nations, World Health Organization and NATO's International Security Assistance Force carried out investigations of the incidents over multiple years, but never found any evidence of toxins or poisoning in the hundreds of blood, urine, and water samples they tested. The conclusion of the investigators was that the girls had a mass psychogenic illness.

8. Brunei (2010) – In April and May 2010, incidents of mass hysteria occurred at two all-girls secondary schools in Brunei. The most recent notable event happened on the 24 April 2014 in a public secondary school. The phenomenon caused a wave of panic among many parents, educators, and members of the community. Some of the students affected by the phenomenon claimed to have been possessed by spirits, or jinn, displaying histrionic symptoms such as screaming, shaking, fainting, and crying.

9. Le Roy, New York (2011–12) – After 12 high school girls developed Tourette-like symptoms in 2011, their school was tested for toxins, and all other factors for their symptoms were ruled out. The case, and some of the girls and their parents, gained national media attention. In January 2012, several more students and a 36-year-old adult female came forward with similar symptoms. They were all diagnosed with conversion disorder.

10. Sri Lanka (2012) – From November 15–20, 2012, incidents of mass hysteria occurred at 15 schools in Sri Lanka. More than 1,900 school children of 15 schools in Sri Lanka and five teachers were treated for a range of symptoms that included skin rashes, vomiting, vertigo, and cough due to allergic reactions believed to be mass hysteria. It originated at the Jinaraja Balika Vidyalaya in Gampola on November 15, 2012, when 1,100 students were admitted to hospital with a range of symptoms that included skin rashes, vomiting, vertigo and coughing. Later, authorities had to close down the school for 3 days.

11. Recurrent epidemic of mass hysteria in Nepal (2016–2018) – A unique phenomenon of “recurrent epidemic of mass hysteria” was reported from a school of Pyuthan district of western Nepal in 2018. After a 9-year-old school girl developed crying and shouting episodes, quickly other children of the same school were also affected resulting in 47 affected students (37 females, 10 males) in the same day. Since 2016 similar episodes of mass psychogenic illness has been occurring in the same school every year. In 2016, twelve students were affected and in 2017, a total of 18 students of the same school were affected showing various symptoms in a single day. Hence it was thought to be a unique case of recurrent mass hysteria.

12. Ketereh, Malaysia (2019) – In August 2019, the BBC reported that schoolgirls at the Ketereh national secondary school (SMK Ketereh) in Kelantan, started screaming, with some claiming to have seen 'a face of pure evil'. Professor Simon Wessely a former president of the Royal College of Psychiatrists, suggested it was a form of 'collective behaviour'.

13. Starehe Girls' Centre, Kenya (October 2019) – 52 students were isolated with an unknown disease, showing symptoms of a high-pitched cough, sneezing and low-grade fever, a number that later rose to 68. As the number rose, the school's administration shut the school down and instructed parents to pick up their daughters. Specimens collected from the affected students showed only two cases of rhinovirus, a virus that is the predominant cause of the common cold. After carrying out psychological assessments on the students, a team of mental health specialists dispatched by Kenya's Ministry of Health to the school concluded that the 'mysterious' disease was a case of mass hysteria.