Aversive Therapy
Therapy that seeks to change an unwanted behavior by applying an aversive stimulus each time the behavior occurs. For example, applying an unpleasant tasting substance to the fingernails - if someone bites the nail, it will create a "yuck" response and reduce the chance of biting the fingernails again.
People think they can destress and regulate their emotions by using only their minds.
The Vagus Nerve Miracle