"Keep a stiff upper lip" or "get a grip!" That's often the advice we get-and give-on how to cope with stress. If you take it literally, the result could be grinding your teeth or clenching your jaws. It's called bruxism, and often it happens as we sleep, caused not just by stress and anxiety but by sleep disorders, an abnormal bite or teeth that are missing or crooked. Symptoms include a dull headache or a sore jaw. You could have teeth that are painful or loose from severe grinding. This can lead to fractures in your teeth. Millions have suffered years of chronic headache and facial pain. Many of those are the result of an imbalance between the Tempromandibular Joint (TMJ), the muscles of chewing, and the teeth. Chronic headache and facial pain sufferers experience a silent segregation from the world around them. Their plight is often invisible to the outside world, save those who would read their pain.