The first thing to distinguish is the cause of coarse wheezing in babies. Commonly, coarse wheezing in babies is seen in nasal congestion after external sensation, fever, infections of the bronchi, trachea and lungs, asthma, congenital laryngeal wheezing, or other diseases that cause respiratory symptoms. 1. The most common is congenital laryngeal wheeze: a laryngeal sound when inhaling due to laryngeal cartilage dysplasia. The clinical manifestation is the gradual onset of laryngeal stridor 1 to 2 months after birth. It is mostly persistent or intermittently aggravated. Laryngeal tinnitus occurs only during the inspiratory period and may be accompanied by inspiratory dyspnea. 2, external nasal congestion: at this time, you need to pay attention to observe whether the baby has fever, cough, how the baby’s breathing rate and heart rate, whether there is nodding breathing, nasal flapping, mouth bubbles; whether there is choking, choking cough, milk from the mouth and nose, etc., to avoid the occurrence of neonatal pneumonia. 3, bronchial: infection of the airways, often accompanied by cough, coughing, fever and other symptoms. 4, asthma can also cause the baby to breathe coarse gas: baby breathing can be heard croup, in severe cases the lips of the mouth purple, breathing difficulties. If your baby has coarse breathing but no other obvious accompanying symptoms, it is possible that the secretions in the nasal cavity are blocked and can be cleared in time. If other symptoms appear, you should seek medical attention in time to avoid delaying the condition.