Doctors don't completely understand what causes bruxism. Possible physical or psychological causes may include:

  • Anxiety, stress or tension
  • Suppressed anger or frustration
  • Aggressive, competitive or hyperactive personality type
  • Abnormal alignment of upper and lower teeth (malocclusion)
  • Other sleep problems
  • Response to pain from an earache or teething (in children)
  • Complication resulting from a disorder, such as Huntington's disease or Parkinson's disease
  • An uncommon side effect of some psychiatric medications, including certain antidepressants
May. 19, 2011