Shortness of breath in babies may be caused by improper sleeping position, respiratory infections, congenital factors, etc. It needs to be judged in the context of the specific situation, and medical attention should be sought if necessary. 1. Improper sleeping position: improper sleeping position is a common cause of shortness of breath when the baby sleeps. Shortly after birth, the baby is not yet fully developed, the baby’s nasal cavity is shorter and narrower, so it is easy to shortness of breath when sleeping. At this time, parents need to help the baby to adjust the sleeping position. 2. Respiratory infections: respiratory infections such as colds, pneumonia, etc. can easily cause inflammation of the tonsils, producing some secretions, which may affect normal breathing, so this is also a common cause of shortness of breath in babies. 3. Congenital factors: it may also be caused by congenital structural abnormalities of the baby sleep shortness of breath, such as congenital heart disease. There may also be other causes of shortness of breath, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, to give targeted treatment or treatment.