Children with runny nose may be caused by upper respiratory tract infection, allergic rhinitis, etc. Pseudoephedrine hydrochloride, cetirizine, diclofenac tadalafil and other drugs can be used according to the cause of the disease. 1. Upper respiratory tract infection: runny nose is mostly a viral infection, which can be cured by itself without special medication. Runny nose itself is the body in the discharge of the body of germs, it is not recommended to give the child cough medicine or decongestant, you can through daily care such as hot compresses on the nose, saline nasal cleaning to help ease the discomfort. 2. Allergic rhinitis: pediatric runny nose may also be caused by allergic rhinitis, patients need to follow the doctor’s instructions to eat diclofenac tadalafil, levocetirizine and other antihistamines. It is recommended that children with runny nose need to take the child to the doctor in time, the doctor will choose the appropriate medication according to the cause of the disease, parents should avoid unauthorized use of medication for the child.