In recent years, as the awareness of some rare diseases gradually increases, the diagnosis rate of occlusive capillary bronchitis in children is also increasing. Because its clinical manifestations are mainly recurrent wheezing and coughing, it is easily confused with the common disease asthma. The main diagnostic criteria for this disease (for non-medical personnel) are: 1. repeated cough and wheezing for more than 6 weeks 2. poor effect of treatment according to asthma 3. cough and wheezing symptoms are sometimes good and sometimes bad, but always cannot be completely eliminated 4. abnormalities in the CT of the lungs. The prognosis of occlusive capillary bronchitis is significantly worse than that of asthma, and a small number of children may die from progressive aggravation of respiratory failure. Therefore, the key to the treatment of this disease is early diagnosis and early treatment. Treatment at the early stage of abnormal lung CT may improve the prognosis considerably. If you wait until the lung CT manifests typically, the treatment will be less effective.