Common causes of shortness of breath at night include: 1, the indoor environment, temperature, baby sleep breathing is shallower than usual, if the indoor temperature is too low, too high will affect the night breathing, respiratory difficulties, and thus there will be shortness of breath symptoms, be sure to night indoor temperature, humidity adjusted to the optimal. 2, nasal congestion, a lot of babies because they do not timely clean out the nasal cavity of the nasal crust, so there will be nasal congestion symptoms The baby will have nasal congestion, which affects breathing, making shortness of breath, parents must promptly clean up the nasal cavity of the nasal crust for the baby. 3, upper respiratory tract infection, when attacked by viruses and bacteria, the baby will have upper respiratory tract infection symptoms, infection of the trachea, bronchial tubes, the entire upper respiratory tract will be inflammatory reaction. When the release of inflammatory factors will block the respiratory tract, so that the respiratory tract becomes narrow, thus making shortness of breath, if it is clear that when the upper respiratory tract infection, parents must take the baby to the hospital standardized examination and treatment.