Asthma attacks vary in severity. Mild to moderate attacks are not considered a serious disease and can be controlled with treatment programs, but severe asthma can be life-threatening within minutes. 1. Most patients with asthma can be relieved on their own or after treatment, after standardized treatment, 80% of patients can achieve clinical control, does not affect the normal work and life, belong to preventable and controllable diseases. 2. Severe and critical asthma attack or asthma severe persistent state can cause respiratory failure, acute respiratory distress, impaired consciousness, malignant arrhythmia, and even cardiac arrest and life-threatening. Asthma requires standardized examination and treatment under the guidance of specialists, and regular follow-up and review, in the hope of achieving clinical relief.