Do you clench and grind your teeth while sleeping? That could be owing to stress and yoga and meditation may help experts say. While many people may not realise it teeth-grinding is not just simply annoying it could also be causing headaches jaw pain and wearing down of your teeth. ‘Called 'nocturnal bruxism' teeth-grinding occurs as a response to the teeth not fitting quite right’ said Ohio dentist Matthew Messina from the American Dental Association. Stress is a known aggravator of bruxism. When you are stressed you gain energy that needs to be released somehow - and for certain people that