1. Breathing with your mouth open is not good for children, which is a sign of poor breathing during sleep. Affect the child's lip growth: If the child breathes through the mouth for a long time, it will affect the child's lip growth, causing the child's lips to turn outwards, thus making the child's lips bigger and thicker. Children breathe through their mouths. Because the bones of children's teeth have not been fully shaped, breathing through the mouth will also affect the growth of teeth. There may be buckteeth, covering the sky and so on. If the child breathes through the mouth for a long time, it will affect the child's facial growth, leading to facial deformity, long maxilla and stiff face. It has a great influence on the child's face value.

2. Wrong sleeping habits: Wrong sleeping posture will lead to neck bending, poor breathing and mouth opening. Therefore, when sleeping, it can be improved to put the baby's shoulders and pillows behind the pillows and keep the head and neck slightly backward. After the bad habit of sleeping is corrected, I won't open my mouth and breathe. Nasal congestion: Many children suffer from rhinitis and even sinusitis because of certain diseases, which means they can only breathe with their mouths open. At this time, they should go to the hospital for treatment in time. There may be too much dirt in the nose. Parents can clean the nose before the baby goes to bed to ensure the baby's normal sleep.

3. Correction: It is very effective for the baby to wear a special veil mask when sleeping and develop the habit of breathing with his mouth open. Let the baby wear it when sleeping at night, and pay attention to leaving the nostrils outside, which can guide the baby to breathe through the nasal cavity. This veil mask must be soft and breathable. It is recommended to buy genuine products from regular pharmacies or hospitals. Change your sleeping position: For example, when you sleep in the left or right position, your tongue will contract backwards under the action of gravity, which may block the upper respiratory tract, narrow it, and then open your mouth to breathe. When the left or right lateral position is adopted, the tongue droop can be obviously reduced, and if the phenomenon of breathing with the mouth open is obviously relieved, no special treatment is needed;