What you call involuntary teeth grinding has an official term; bruxism is that term and it can refer to involuntary grinding that takes place either while you are awake or asleep. Grinding that only takes place during the night is known as nocturnal bruxism and is potentially a much more serious problem .One telltale sign that you may be unknowingly suffering from nocturnal bruxism is routinely waking up with a sore jaw, aching teeth or even a headache. Other symptoms of involuntary grinding of teeth would be a notable dulling of sharp teeth like the incisors or unexplained wearing down of flattened teeth like molars. A number of treatment options are available for bruxism: Occlusal Splint’s that can be worn day or night (Nightguard) or Orthodontic Adjustments.