The End of Boiling Oil and the Compassionate Scalpel: Ambroise Paré and the Birth of Surgical Mercy

In 16th-century Europe, the spread of firearms turned wars into scenes of shattered bodies and massive bleeding. Physicians of the time believed gunpowder was “poisonous” and, to eliminate this imaginary poison, poured boiling elder oil into wounds. The same ruthless cauterisation (burning) was used when cancerous tumours were excised; patients often died not from the disease, but from the pain and shock caused by this trauma.

Until one night, when a former barber-surgeon’s apprentice named Ambroise Paréran out of boiling oil...

The Siege of Turin: A revolution born of fear

During the Siege of Turin in 1536, the young Paré ran out of boiling oil and, in desperation, applied a simple ointment he had read about in ancient texts (egg yolk, rose oil and turpentine) to the soldiers’ wounds. His conscience kept him awake that night; he thought the soldiers would be poisoned and die.

What he saw when he awoke the next morning changed medical history forever: those burned with boiling oil were writhing in pain, while the soldiers treated with the simple ointment had slept peacefully. That day, Paré made this historic entry in his diary: “Never again will I burn poor people so cruelly.”

The era of ligature (tying blood vessels) in oncology

Paré’s philosophy of “refusing to burn” opened an enormous door in surgery for heavily bleeding tumours such as breast cancer. Until then, the only way to stop gushing blood had been to press red-hot iron against the wound. Guided by the anatomical maps drawn by Vesalius, Paré developed a revolutionary technique: Blood Vessel Ligation.

Honesty and palliative awareness in the face of cancer

As chief surgeon to kings, Paré always remained humble before cancer. He fiercely criticised alchemists for applying flesh-eating substances such as arsenic and sulphuric acid to cancerous wounds. He observed firsthand that these caustic substances did not cure cancer, but instead “angered” the tumour and increased the patient’s suffering.

In advanced cases, he insisted on compassionate care (pain-relieving ointments and soothing methods) rather than putting the patient under strain. His medical philosophy saw the patient not as an “object” to be repaired, but as a “human being” in need of healing.