Wheezing is not a disease but a symptom. The wheezing sound parents hear from their babies often describes a pulling sound or a grunting sound; what doctors hear with a stethoscope is a wheezing sound also called a croup; this sound is the sound made by the airflow through the airway walls, indicating that some part of the airway is narrowed or blocked. There are several diseases that can cause wheezing in babies: capillary bronchitis, wheezing bronchitis, wheezing bronchopneumonia, bronchial asthma, and occlusive fine bronchitis. Wheezing can cause hypoxia in babies and in severe cases can cause cardiac or pulmonary dysfunction; treatment needs to be actively given. At present, the important means of treating wheezing is nebulized inhalation therapy, inhalation drugs include inhalation hormone and inhalation bronchodilator two categories, according to the baby’s age to choose the dose, according to the severity of wheezing to choose the number of inhalation per day, wheezing severe can be inhaled 4-6 times a day, as the symptoms reduce, gradually reduce the number of times to 2 times a day, generally need about 1 week. For some babies who have frequent episodes of wheezing, attention should be paid to identify children who may develop persistent asthma, and effective early intervention is necessary, early intervention and management is beneficial to disease control and improve the prognosis. In addition, it is important to keep the indoor air circulating and fresh, avoiding dirty and noisy environments; to pay attention to the removal of triggers, such as keeping allergic babies away from allergens, and to actively treat other infections.