In most cases tooth grinding, also called bruxism is mild. But, when it’s frequent and severe, Grinding your teeth can aggravate the joints in your lower jaw, also known as the temporomandibular joints, or TMJs. This can lead to pain or tightness in the joint area, and even earaches and headaches.
If you have unexplained facial pain, earaches or headaches, or tenderness around the jaw joint, you could be grinding without knowing it.
You may be more likely to grind or clench your teeth if you’re stressed, tense, anxious or frustrated.
A common and very successful approach is a plastic mouth guard, which fits over your teeth and reduces or eliminates damage from unwitting grinding during sleep.