Additional exclusion criteria included being pregnant or breastfeeding, taking prescription pain medications, the presence of lip, cheek, or tongue piercings, or prior diagnosis with a disorder involving either a loss of sensitivity or chronic pain.
Additional exclusion criteriaincluded being pregnant or breastfeeding, taking prescriptionpain medications, the presence of lip, cheek, or tongue piercings,or prior diagnosis with a disorder involving either a loss of sensitivityor chronic pain.