Children sleeping with their mouths open may affect their looks, such as the depression and deformation around the mouth, the root of the nose is sunken, etc., depending on the length of time the mouth is open to sleep. Children like to sleep with their mouths open to sleep may be adenoid hypertrophy or colds and nasal congestion and other causes, if due to colds and nasal congestion caused by transient open-mouth sleep, this is generally when the cold is well, the child will close the mouth, will not have an impact on the looks. On the other hand, if adenoid hypertrophy is caused, if not treated in time, long-term such a sleeping position, may lead to the appearance of the mouth around the mouth may have depression deformation, the root of the nose sunken and so on. In addition, long-term open mouth sleep, not only will affect the child’s appearance, but also reduce the quality of sleep, affecting the normal development, it is recommended that timely medical treatment.