Baby cough sleep with wheezing sound may be related to bronchitis, pneumonia, laryngeal tenderness and other factors. 1. Bronchitis: babies with bronchitis have increased tracheal secretions, which can stimulate tracheal spasms and cause coughing. And because the baby’s breathing is obstructed by phlegm at night when he sleeps, wheezing sounds will appear. 2. Pneumonia: When the baby’s lungs are infected by bacteria, viruses and other pathogens, in the early stages of the disease, the baby will have an irritating cough and cough with phlegm, but because the baby can not cough up phlegm, resulting in phlegm remains near the trachea, at night when sleeping, wheezing may occur. 3. Laryngeal chondromalacia: Laryngeal chondromalacia is a condition in which the soft tissues in the upper part of the baby’s voice box collapse into the laryngeal valve when he breathes, leading to a blockage of the windpipe, which stimulates the baby’s coughing and wheezing while he sleeps. Baby cough sleep wheezing sound may also be related to other causes, such as bronchial asthma, etc., to go to the regular hospital to identify the cause of the disease in a timely manner, and under the guidance of a professional doctor to choose the appropriate method for their treatment.