Medieval Europeans Had Tooth Worms

For anyone suffering a throbbing toothache in medieval Europe, the diagnosis was often terrifyingly simple: a tooth worm had burrowed into the enamel. This belief wasn't just a wild guess; it was based on what seemed like direct visual evidence. When a badly decayed tooth was cracked open, the white, squirming-looking nerve pulp inside looked uncannily like a tiny worm. The concept was ancient, with roots stretching back to Sumerian texts, and it provided a tangible villain for the invisible agony of tooth decay. This explanation was so compelling that it became one of the most widespread and long-lasting medical theories in history.

The "cures" were as dramatic as the supposed cause. Barbers and so-called dentists would perform treatments meant to expel or kill the parasite (Review). One common method was fumigation, where a patient would inhale the smoke from heated henbane seeds. The seeds contained a narcotic that would numb the pain, but more importantly, the charred seed fragments that fell during the process were presented to the patient as the dead worms falling from their tooth. Other, more brutal methods involved using hot irons to cauterize the tooth and gum or attempting to extract the worm with a fine needle.

The tooth worm theory began to unravel in the 18th century with the rise of scientific dentistry, pioneered by figures like Pierre Fauchard. He correctly identified sugars and acids as the primary culprits behind tooth decay, dismissing the worm as folklore. However, the image of the tooth worm was deeply embedded in cultural memory. Despite mounting scientific evidence, this ancient belief persisted in folk medicine traditions in various parts of the world, a testament to how a visually convincing idea can resist change for centuries.