Most of the postnasal drip in children is caused by rhinitis or sinusitis, and the nasal cavity has more secretions, which do not flow out from the front nostril but from the back nostril to the throat, resulting in a foreign body feeling in the throat, or coughing and throat discomfort. If the condition is mild, most children can be cured with timely treatment and daily care. If the condition of children is mild, the secretions can be removed from the surface of nasal mucosa by timely washing of nasal cavity to reduce the irritation of nasal mucosa and reduce the inflammation, and then spraying mometasone furoate nasal spray can control the inflammation and edema of nasal mucosa and reduce the secretion of inflammatory secretions. If the nasal mucus is sticky and difficult to discharge, children can take mucus promoter such as eucalyptus pinene enteric soft capsule orally to help discharge the nasal mucus. If the sinusitis is caused by repeated stimulation of tonsillitis, the tonsils can be removed surgically, and generally the postnasal drip of children can be cured after treatment. Daily attention should be paid to pediatric nasal care, it is recommended to wear a mask to reduce dust and bacteria inhalation, thus reducing the stimulation of the nasal mucosa, so that the inflammation of the nasal mucosa is reduced. Humidifiers can be used indoors to increase the humidity of the air, which is conducive to the thinning of nasal snot and the maintenance of a stable environment in the nasal cavity, which is also conducive to the recovery of inflammation.