Because the baby’s nasal cavity is shorter than the adult’s, nasal mucosa is delicate, rich in blood vessels, the nasal passage is narrower, cold, cold and flu when the nasal mucosa congestion, swelling, secretion increase and cause nasal congestion, poor ventilation and other symptoms, especially at night nasal congestion symptoms are more pronounced, if the baby is cold is not very serious, you can self-regulation. In addition, pay attention to keep the indoor air temperature, humidity, pay attention to indoor ventilation, timely cleaning nasal secretions, head slightly elevated, drink more water, nasal paste, nasal root hot compresses, warm water fumigation of the nasal cavity, to keep the nasal cavity moist. If allergies cause nasal congestion, avoid contact with allergens, and if necessary, give loratadine and other drugs for anti-allergy treatment. Prolonged nasal congestion is not relieved, it is recommended to carry out nasal CT examination, pay attention to whether there is rhinitis, sinusitis, adenoid hypertrophy, swelling and other diseases exist.