If the patient has open-mouth breathing at night, it is recommended to consult a stomatologist first to clarify whether there are any problems with the patient’s upper and lower teeth bite If there are, they must be actively corrected. The patient is considered to have sleep apnea syndrome, which may be caused by nasal non-ventilation or a particularly narrow pharyngeal cavity. It is recommended that the patient go to a sleep center to improve sleep monitoring and clarify the specific type of snoring. If it is due to obstructive, often need to perform nasal septum correction surgery or tonsil removal surgery, active treatment after the patient sleep open mouth breathing situation should be significantly improved, the patient should be appropriate exercise in life, avoid too obese, recommended to sleep in the side position, to avoid aggravating the open mouth breathing situation.