A study at Baltimore’s Laboratory of Personality and Cognition has recently been conducted into levels of anxiety and neuroticism in people who grind their teeth. Participants were examined by a dentist before being given personality tests, and results indicated that neuroticism-related traits were higher among those who reported teeth-grinding. These traits were also associated with other oral complaints such as jaw clicking, difficulty chewing food, and a dry mouth, but not with more general oral complaints such as unhealthy or bleeding gums or mouth ulcers.