Baby cough, sleep whirring sound is mainly related to respiratory infections, such as acute upper respiratory tract infection, acute bronchitis, bronchopneumonia and so on. 1. Acute upper respiratory tract infection: commonly known as colds, mostly due to influenza virus, coxsackie virus, etc., usually accompanied by cough, fever and other symptoms, when there is nasal congestion resulting in narrowing of the airway, there will be a whirring sound when sleeping. 2. Acute bronchitis: viruses or bacteria and other causes of bronchial mucosal infections, lung breath sounds will thicken, while there may be sputum accompanied by coughing, when the baby sleeps, there will be a whirring sound. 3. Bronchopneumonia: Inflammation of the lungs caused by different pathogens, such as bacteria and viruses. Generally accompanied by fever, cough, lungs on auscultation with rales, can appear when the baby sleep breathing sound aggravation. Baby cough, sleep whistling can also be seen in other causes, it is recommended to consult a doctor in a timely manner, with the help of the doctor to clarify the cause, and targeted treatment or treatment.