Mass psychogenic illness
Mass psychogenic illness (MPI), also called mass sociogenic illness, mass psychogenic disorder, epidemic hysteria or mass hysteria, involves the spread of illness symptoms through a population where there is no infectious agent responsible for contagion. It is the rapid spread of illness signs and symptoms affecting members of a cohesive group, originating from a nervous system disturbance involving excitation, loss, or alteration of function, whereby physical complaints that are exhibited unconsciously have no corresponding organic causes that are known.
Extends: [Behavioral addiction](https://wikipedia.org.ai/Behavioral addiction), [Crowd psychology](https://wikipedia.org.ai/Crowd psychology), [Group processes](https://wikipedia.org.ai/Group processes), [Mass psychogenic illness](https://wikipedia.org.ai/Mass psychogenic illness), [Social phenomena](https://wikipedia.org.ai/Social phenomena)
Properties
| Property | Expected Type | Description |
|---|---|---|
| Name | Text | Mass psychogenic illness |
| Synonym | Text | Mass hysteria, epidemic hysteria, mass sociogenic illness, mass psychogenic disorder |
| Image | Text | Dance at Molenbeek.jpg |
| Alt | Text | Pieter Brueghel the Younger |
| Caption | Text | Dancing plagues, Middle Ages, Pieter Brueghel the Younger |
| Specialty | Text | Psychiatry, clinical psychology |
| Symptoms | Text | Headache, dizziness, nausea, abdominal pain, cough, fatigue, sore throat |
| Duration | Text | For most cases, under 12 hours to days |
| Risks | Text | female sex |
| Differential | Text | somatic symptom disorder |
| Treatment | Text | Usually isolation or separation from perceived threat |
| Prognosis | Text | Most recover |