Wheezing bronchitis refers to a group of acute bronchitis in infants and children with wheezing manifestations. The lung parenchyma is rarely involved and is mainly caused by infectious factors, and a variety of viral and bacterial infections can cause wheezing bronchitis. In infants, the trachea and bronchi are relatively small, the surrounding elastic fibers are not well developed, and the mucosa is easily swollen by infection or other stimuli, and congestion causes narrowing of the ducts, thick secretions, coughing up, and wheezing sounds. The onset of the disease is mostly in children aged 1-3 years, secondary to upper respiratory tract infections, fever, cough, shortness of breath and even wheezing, some cases may also have recurrent episodes of wheezing, most of which are caused by reinfection. Children with allergic tendencies, such as children, or relatives with eczema, food, or drug allergies, allergic rhinitis, urticaria, asthma, and other allergic diseases, can lead to more likely wheezing, recurrent wheezing, and some children develop bronchial asthma. There are the following high-risk factors for developing bronchial asthma parents should pay attention to whether their child has signs of bronchial asthma Any previous history of allergies, high eosinophils, and elevated serum IgE.