Nasal congestion in children may be caused by allergic rhinitis, cold, nasal polyps, etc., which can be treated with general therapy and medication. 1. Allergic rhinitis: allergic rhinitis is a common cause of nasal congestion in children, which is usually triggered by contact with allergens, such as seafood, pollen and so on. It is characterized by nasal congestion, frequent sneezing and runny nose. In this case, you can take levocetirizine hydrochloride oral solution, loratadine tablets and other drugs to fight allergies and relieve nasal congestion. 2. Cold and flu: this disease is the most common cause of nasal congestion in children, can be caused by viral infections, manifested as nasal congestion, runny nose, cough, fever, etc., you can take pediatric aminophenol xuanamin granules to relieve nasal congestion and other cold and flu symptoms, and if it is influenza can be combined with oseltamivir granules antiviral and other comprehensive treatment. 3. Nasal polyps: If nasal congestion is caused by nasal polyps blocking the nasal cavity, surgical treatment is needed to cure nasal congestion. Children with nasal congestion need to consult a doctor to clarify the cause of the disease, so as not to miss the condition. The above medications need to be used under the guidance of a doctor.