Because of the physiological peculiarities of babies, the nasal cavity is narrow and rich in nasal capillaries. When stimulated by cold air, abnormal odor or upper respiratory tract infection, the mucous membrane of the nasal cavity is prone to congestion and edema, which in turn causes nasal congestion. If the baby’s nose is not ventilated is related to cold, wind and other factors, no special treatment is needed at this time, pay attention to the baby to do a good job of warmth, according to the temperature and weather changes in a timely manner to add or remove clothing, to prevent overdressed, sweating after getting cold; secondly, give the baby to drink more water to promote metabolism and excretion in the body. In addition, you can also use a hot towel to do nasal hot compress, massage the baby with both hands above the ears or use hot ginger to paste on the baby’s feet, the above ways have to promote ventilation. If the baby’s nose is persistently not ventilated, you need to consider the possibility of a cold or acute upper respiratory tract infection, parents should promptly give cold and fever pellets or four seasons of antiviral oral liquid treatment to reduce the symptoms of non-ventilation of the nose. At the same time, give the baby more warm water and try to ensure a light diet. If the symptoms of nasal obstruction persist for more than 10 days without obvious relief, parents should be alert to the possibility of allergic rhinitis and suggest that they take their babies to the hospital for a clear diagnosis.