Does mouth breathing make people ugly?
"Mouth breathing" is an abnormal state of breathing But sleeping with your mouth open is not the same as mouth breathing. When the human body breathes normally, the majority of the respiratory airflow should pass through the nasal cavity, this breathing state is normal breathing. If the respiratory airflow through the mouth and more than a certain percentage (generally in the 25% to 30% or so), it is mouth breathing. Depending on the cause, mouth breathing can be divided into "obstructive mouth breathing" and "habitual mouth breathing". Obstructive mouth breathing is when the nasal cavity is completely or partially obstructed, for example, in cases of rhinitis or colds, airflow cannot enter through the nasal cavity, so in order to ensure sufficient oxygen, one has to breathe through the mouth. Habitual mouth breathing is when the nasal cavity is not obstructed, but you habitually open your mouth to breathe, or you habitually keep breathing through your ...