The main reason why patients snore without opening their mouths is that the patient’s airway is narrow, and when the airflow passes through the narrow area, there is local friction and obstruction of the airflow, so the patient snores. Even if you don’t open your mouth, you will snore because the narrowing of the pharyngeal cavity also exists, but the sound of snoring is smaller compared to opening your mouth. If the patient snores without holding his breath or waking up, it may be physiological snoring and generally does not require treatment. If the patient snores with obvious breath-holding and wakefulness, accompanied by daytime drowsiness, dizziness and other related discomforts, he or she needs to visit an otolaryngologist, who will need to examine the nose, nasopharynx and throat to determine the site of stenosis. Sleep breathing monitoring can also be improved to determine the type and severity of the patient’s snoring. Depending on the patient’s condition, a sleep ventilator can be worn while sleeping, or surgery can be improved, etc., to reduce the patient’s snoring performance.