Bruxism (teeth grinding) – Symptoms and causes – Mayo Clinic

Sleep bruxism may be a sleep-related chewing activity associated with arousals during sleep. Risk factors. These factors increase your risk of bruxism: Stress. Increased anxiety or stress can lead to teeth grinding. So can anger and frustration. Age. Bruxism is common in young children, but it usually goes away by adulthood. Personality type.

https://www.mayoclinic.org/diseases-conditions/bruxism/symptoms-causes/syc-20356095