When children have a runny nose, the symptoms may gradually worsen. When the symptoms of runny nose are relatively mild, the use of any oral medication is not advocated. For runny nose caused by viral infection and allergy, saline can be used to spray into the nasal tract to dilute the nasal mucus and make it easier to discharge, in addition to cleaning the nasal cavity with saline can also play an anti-allergic role. In addition to this, sea saline can also be sprayed in the same way to make the nasal mucosa less congested and reduce the squirting out of the nose. It is recommended to drink more warm water to promote body metabolism. When the symptoms of runny nose are heavy, for simple runny nose, you can use special medicine for children to treat runny nose under the guidance of doctors; if the runny nose is caused by cold, you can use cold medicine and the symptoms of runny nose can be relieved subsequently. If the runny nose is caused by rhinitis, nasal polyps or other reasons, you need to go to the hospital and follow the medical advice. In addition, you can also use some dietary treatment, such as ginger sugar water, white onion boiled in water and take it while it is hot; or take a bath with mugwort water. Finally, during the illness, pay attention to rest to avoid recurrence, balanced diet, reasonable feeding, and timely increase and decrease clothing according to temperature changes. In case of aggravation, seek medical attention promptly.