Did Medical Theories Explain The Dancing Plague Historically?

I still get a little thrill thinking about how people in the 14th–17th centuries tried to make sense of something as surreal as a whole crowd dancing themselves to exhaustion. When I dove into the sources, what jumped out was that medieval and early modern medical thinking was stuck in humors, miasmas, and miracle explanations. Doctors and clerics often framed these events as an imbalance of bodily fluids, a bad air that made people delirious, or even divine punishment and possession. That meant treatments ranged from bloodletting and herbal poultices to prayers and exorcisms.

Centuries later, scholars and physicians have tried to translate those old explanations into modern medical terms. Two big contenders show up in discussions today: ergot poisoning from contaminated rye (which can cause convulsions and hallucinations) and mass psychogenic illness — basically a contagious stress reaction. I find both theories interesting, but the historical evidence nudges me more toward social and psychological causes. Eyewitness accounts describe rhythmic, purposeful dancing and community contagion, not the random seizures or the gangrene you often see with severe ergotism. Also, modern clinicians point out that Sydenham’s chorea (often called 'St. Vitus' dance') is a different, post-streptococcal disorder that doesn’t fit group outbreaks.

So no single medical theory completely explains the phenomenon. It’s a mix: medieval frameworks shaped contemporary responses, and modern interpretations balance toxicological, neurological, and sociological ideas. For me, the human side — stress, famine, religious fervor, and social contagion — makes the most sense, but the mystery is what keeps me reading those old chronicles late into the night.