The causes of bruxism are unknown. Stress, sleep disorders and an abnormal bite are things that sometimes do play a role. Your dentist can diagnose bruxism by checking for unusual wear spots on your teeth and looking at any other related symptoms. Regular dental checkups are important to find any of this damage in the early stages. Your dentist can help you manage bruxism and any related symptoms, as well as repair your teeth if it is necessary to prevent any further damage.