Children 5 years old with runny nose can be seen in environmental factors, allergic rhinitis, respiratory tract infections, etc. Intervention should be made according to the cause of the disease, and attention should be paid to keeping warm if the peripheral environment is cold. 1. Environmental factors: if the peripheral environment temperature is too low, or wearing too little, the above manifestations can occur, need to pay attention to strengthen the warmth, moderately make the indoor temperature higher. 2. Allergic rhinitis: mostly manifested as runny nose, sneezing, etc., may be accompanied by nasal congestion, which usually lasts for a long period of time. Glucocorticosteroids (e.g., fluticasone furoate nasal spray) can be used as localized nasal spray, which can reduce oedema and alleviate inflammation, etc. At the same time, physiological sea saline nasal spray can be applied to the nasal cavity. At the same time, physiological sea saline nasal rinsing can improve the local environment in the nasal cavity. 3. Respiratory tract infections: usually bacterial or viral infections, such as influenza, which is often caused by influenza viruses, and may manifest as fever, general malaise, which may be accompanied by the above mentioned symptoms, requiring the use of oseltamivir phosphate antiviral treatment, etc., as well as symptomatic treatments, such as nasal spray with sea saline, and cleaning of nasal secretions, etc., as appropriate. These medications should be used under the supervision of a physician, and it is recommended to actively seek medical advice and intervention from a specialist.