The coughing and throat whirring in babies is often due to a serious infection of the respiratory system, where the mucous membrane of the respiratory tract has a lot of inflammatory secretions and neutrophils, eosinophils or phagocytes in the body gather at the site of inflammation to swallow foreign viruses or bacteria, and subsequently these cells are shed and necrotic and the inflammatory exudate mix together to form sputum. This phlegm is blocked in the child’s airway and causes a whirring sound in the throat when exhaling. It is often important to provide anti-inflammatory treatment and cough expectorant treatment. The anti-inflammatory drugs need to be selected according to the type of infection of your baby, such as ceftriaxone or penicillin intravenously for bacterial infection, ribavirin intravenously for viral infection, and azithromycin intravenously for mycoplasma infection.