When stress spreads through a crowd

Recent incidents of unusual behaviors among students in schools have sparked discussions, often leading to the term 'mass hysteria.' While explanations range from supernatural forces to poisoning or feigning illness, psychologists now often refer to these events as mass psychogenic illness (MPI).

MPI describes situations where a group develops similar physical symptoms that cannot be attributed to an infectious disease or other clear medical cause. This phenomenon highlights the powerful connection between the mind and body. Our thoughts and emotions can trigger real physical changes, such as a racing heart due to stress, trembling from fear, or an upset stomach from anxiety.

These symptoms are not imaginary; they are genuine physical responses to emotional distress. When people share the same environment and stressors, anxiety can spread through a group. This contagion of emotion and expectation influences how individuals experience and interpret physical sensations. Essentially, when under significant stress, the body seeks ways to express that distress, and witnessing similar symptoms in others can amplify one's own physical awareness.

A common misconception is that if doctors find no virus or poison, those affected were pretending. However, psychological symptoms are real. Individuals may experience fainting, dizziness, headaches, breathing difficulties, weakness, stomach pain, or exhibit unusual behaviors. These are genuine manifestations of distress, not fabricated experiences.