Teeth-grinding could signal sleep problems

Sleep-related bruxism is the official term for grinding your teeth during sleep. It occurs in approximately 14% to 17% of children, although these rates decrease with age. Bruxism does show a familial pattern but no genes have been identified. It affects both sexes equally.
Nocturnal grinding can cause not only extensive wear on your teeth, but also jaw and facial pain, headaches, and when it is severe, it can cause sleep disruption that results in daytime drowsiness.
Even in the absence of a clear psychiatric or medical cause, sleep specialists often note heightened stress and anxiety as a predisposing factor. Some specialists have found an association with a Type A personality or someone who is hyper-vigilant and easily aroused from sleep.

Reference: CNN