Hello, my friend, children need to consider breathing problems when breathing with their mouths open. Take the child to the otolaryngology department to check whether the nasal passages are unobstructed. Rule out turbinate hypertrophy's problem Once the symptoms of breathing through the mouth appear, it must be some reason that leads to nasal congestion, forcing children to breathe only through the mouth. There are cilia in the nasal cavity, which can expel microorganisms and dust inhaled with the air during activities. There are also paranasal sinuses in the nasal cavity, which can warm the inhaled air. Breathing through the mouth deprives children of this protection mechanism and is prone to illness. You can let your baby drink plenty of water, or you can gently dip a cotton swab in the nostril. When the nasal scab is soft, gently remove it. The child is in the stage of physical growth and development. Breathing with your mouth open for a long time will not only lead to poor rest and reduce the quality of sleep, but also cause brain hypoxia and affect intelligence. Frequent oral breathing not only threatens intelligence, but also causes maxillary protrusion and even facial deformation, which has a great influence on appearance.