The face does not necessarily change with open mouth breathing. If a minor with soft tissues and bones in the face are not yet fully developed and breathe with their mouth open for a long period of time, their face may change. However, in adults who have completed facial development, open-mouth breathing usually does not have much effect on the face. In minors who breathe through their mouths for a long period of time due to nasal congestion, enlarged adenoids, or bad habits, the activity of opening their mouths night after night may affect the development of the soft tissues or bones of the minor’s face. It may change their facial appearance, such as thickening of the lips, curling up of the upper lip, high arching of the upper jaw, protruding teeth, etc. Even a typical adenoid face may develop. Adults because the facial soft tissues of the maxillofacial cranial bone has completed development, if due to nasal breathing or overweight and other reasons caused by its open mouth breathing, generally does not have too much impact on the face. Because of the open-mouth breathing caused by facial changes in minors, to go to the hospital in a timely manner to actively treat the original disease, do not delay, so as to avoid adverse physical and mental effects.