Some patients develop a subconscious habit of grinding their teeth, either during the day or night. In many cases, the abrasive action occurs only during sleep, and for only a few seconds at a time. If you wake up with a sore jaw or a morning headache, chances run high you're grinding your teeth during the night. In some patients, enlarged jaw muscles develop on the sides of the face from the extra activity. These muscles can be the strongest in the body, ounce for ounce. That means they can generate a lot of unnecessary damage.
The unusual activity not only wears down teeth and strains the overworked muscles. The compressive forces can also damage the intricate jaw joints on one or both sides. Damage to the joints may lead to arthritic changes, chronic pain, and popping or clicking. Once these changes settle in, reversing their condition may become impossible.