If this symptom is present, it is best to go to the hospital to improve the nasal endoscopy, mainly to check the color of the nasal mucosa and whether there is any retention of secretions. If it is pale and edematous, it may be caused by allergic factors, while if it is simply congested, it may be caused by inflammatory or viral infections. Regardless of which factor causes it, you can use nasal glucocorticoid nebulizer inhalation treatment, this kind of drug belongs to local absorption, relatively high safety, commonly used are budesonide suspension, at the same time can use saline to perform nasal rinsing, conducive to the flow of secretions. Children at this age have a relatively strong immune system and can quickly get better from a cold, as long as there are no obvious systemic symptoms, such as fever and refusal to eat.