For open mouth breathing, early detection, early prevention and early treatment must be achieved. Childhood is the most critical and golden stage in the comprehensive development of teeth and jaws facial shape in a person’s life, if you miss the golden stage, and then to intervene in orthodontic treatment, the effect will be greatly reduced. Prevention and treatment measures are mainly the following: 1, remove the cause of open mouth breathing: the most common cause of nasal breathing, respiratory tract is not open, such as allergic rhinitis, chronic rhinitis, tonsillitis, adenoid hypertrophy, etc. may cause the child’s mouth breathing, it is recommended to go to the hospital to determine, timely removal of the cause; 2, behavioral intervention: If the cause of the removal of the cause still appear open mouth breathing, behavioral intervention can be carried out to To correct the child’s bad habits, such as spitting out the tongue, pursing lips, biting teeth, etc.; 3, orthodontics: after the end of dental growth still can not correct the open mouth breathing or open mouth breathing symptoms still exist, can be corrected through orthodontics, such as orthodontics, wearing braces and other ways to correct the open mouth breathing habits.