Worn teeth is a sign that you may be more stressed than you realize. Stress can manifest as teeth grinding, wearing down teeth. Your personality type may predispose you to grinding, too. According to the 2010 study in the Journal of Research in Personality found that people who rated higher on the neuroticism scale were also more likely to report that they grinded their teeth.

Research in the International Journal of Oral Science in 2014 reported that sustained jaw clenching (another characteristic of bruxism, or teeth grinding) can lead to severe damage of the tissue in the joint that connects your jaw to the rest of your skull.