Children, teenagers, and adults may suffer from Orofacial Myofunctional Disorders. OMDs may interfere with normal growth and development of the muscles and bones of the face and mouth. OMDs may also interfere with how the muscles of the face and mouth are used for eating, talking, and breathing. People who have an OMD may also have problems with talking, swallowing, and breathing through their nose. Some children push out their tongue when they talk, drink, or eat. This is called tongue thrusting and it is one type of OMD.