If a newborn baby makes strange sounds while sleeping, it is mainly caused by the following conditions: first, caused by improper sleeping position, if the newborn baby’s sleeping position is improper, resulting in poor airway ventilation, it will cause strange breathing sounds. Secondly, it is caused by congenital laryngeal wheezing. If there is congenital dysplasia of the trachea, it will cause inspiratory wheezing, especially during sleep, and the symptoms are very obvious. Finally, it can also be caused by gastrointestinal dysfunction. If there is an obvious hyperintensity of intestinal sounds during sleep and a rumbling sound in the stomach, it is mostly caused by gastrointestinal dysfunction and can be regulated with probiotics in time.