The severity of each attack is scored on a scale of 1-4: 1, mild attack, no shortness of breath and dyspnea, can be relieved by oral Meprobamate or Enactin, or by inhalation of Ventolin, some of which can be relieved on their own 2, moderate attack, with shortness of breath or dyspnea, with obvious croup, requiring hospital emergency nebulized bronchodilators and even intravenous rehydration hormone to relieve 3, severe attack, with cyanosis, with obvious shortness of breath and The oxygen saturation is significantly decreased in the hospital, which requires nebulized bronchodilators and intravenous hormone rehydration for a few days in the outpatient clinic or in the hospital. 4. Critical attack, with blue face, confusion, severe shortness of breath and dyspnea, or even respiratory failure, which requires admission to the intensive care unit, continuous oxygen inhalation or tracheal intubation, and assisted ventilator ventilation.