Children who sleep with their mouths open may have enlarged adenoids or nasopharyngeal disorders, which need to be corrected in a timely manner, as the long-term presence of this condition will affect their facial features and symptoms such as nasal congestion. Children who sleep with their mouths open and breathe with their mouths open may have adenoid hypertrophy, which can easily affect their facial development, such as impaired facial bone development, elongated jaws, high arched palate, and other “adenoid face”, affecting the overall aesthetics. Therefore, if the condition exists, it needs to be corrected as soon as possible, and if necessary, surgery is needed. Children’s open-mouth breathing may also be nasopharyngeal diseases, such as chronic rhinitis, intranasal polyps, etc., which can cause nasal blockage and induce children to open their mouths to breathe, and at the same time will also be accompanied by the symptoms of snoring in bed. It is necessary to actively treat the primary disease. When children are found to be sleeping with their mouths open, it is recommended to consult a doctor in time.