Most people are unaware that they grind their teeth, because it usually occurs when we are asleep. If you awake suffering from a dull constant headache or sore jaw, you could be grinding your teeth in your sleep. Often many people discover they are grinding their teeth when heard by a loved one at night.
If you suspect you may be grinding your teeth, talk to your dentist. He or she can examine your mouth and jaw for signs of bruxism, such as jaw tenderness and excessive wear on your teeth.