There is no fastest solution for runny nose in children. Children’s runny nose may be due to allergic rhinitis, upper respiratory tract infections and other factors, mostly treated with medication. 1. Allergic rhinitis: watery nasal discharge and sneezing are the main symptoms, which may be accompanied by eye symptoms such as itchy eyes and conjunctival congestion. Avoid contact with suspected allergens, such as: house dust mites, pets, cockroaches, pollen, mold, etc. Use air filtration systems, remove pests, and avoid keeping pets in families with a history of the disease. You can also use physiological sea salt water to wash the nose, can be under the guidance of the doctor to use loratadine, cetirizine and other drugs treatment. 2. Acute upper respiratory tract infection: children may have a runny nose and other symptoms, mostly caused by viral and bacterial infections, for runny nose can be used physiological sea salt water nasal spray, which can dilute mucous secretions and improve the sense of smell. If combined with bacterial infection, should follow the doctor to use cefixime, amoxicillin and other antibacterial drugs; if the influenza virus caused by the application of oseltamivir and other antiviral drugs treatment. All of the above drugs are recommended to be taken under the guidance of a doctor and should not be used on their own. There are many other causes of children’s runny nose, it is recommended to consult a doctor in time to clarify the cause of the disease and give targeted treatment or therapy.