Cold nasal sound is serious, mainly due to the body cold, rain, resistance decline and other triggering factors, so that viruses, bacteria, mycoplasma, chlamydia, rickettsiae and other pathogens invade the body, resulting in nasal mucosa congestion, edema, a large number of inflammatory substances exuded inflammatory reaction. At this time, the nasal cavity relative to the normal state to narrow, in and out of the lungs of the gas through the nasal cavity, there will be varying degrees of obstruction, in the speech of the airflow is restricted, vibration of the nasal mucosa of the inflammatory secretion and nasal sound. Clinically, it can be seen in acute rhinitis, as well as the acute attack of chronic rhinitis caused by colds.