What historical technique was employed to release the "evil" that was thought to cause diseases?

Trepanning refers to an ancient medical practice in which a hole is drilled or scraped into the human skull. This technique was commonly used in various historical cultures with the belief that it could relieve pressure from the skull or release evil spirits that were thought to cause mental diseases or physical ailments. The underlying notion was that certain afflictions were attached to supernatural forces or physical imbalances, and trepanning would facilitate the expulsion of these harmful entities or alleviate the presumed issues associated with the brain.

Exorcism, while also aimed at addressing perceived spiritual disturbances, specifically involves ritualistic procedures to expel demons or evil spirits from a person or space. While bloodletting was a method used to treat a variety of ailments by draining blood to restore balance in the body, it does not specifically relate to the notion of releasing evil. Trepanation is a term that refers to the same practice as trepanning, but the wording typically reflects more modern terminology. The correct choice highlights the historical significance of trepanning in the context of ancient medical beliefs and practices regarding disease and health.