Croup is seen in bronchial asthma, cardiogenic asthma, bronchodilatation, bronchitis, or aspiration of foreign objects, etc. It requires prompt medical attention and usually cannot be cured on its own. 1. Bronchial asthma: anti-asthma drugs such as budesonide, salbutamol, montelukast, etc. are needed to control the symptoms, and the rales can be weakened or disappeared. Bronchial asthma is often characterized by self-relief, and the wheezing sounds can disappear on their own, but it does not mean that the disease is self-cured. 2. cardiogenic asthma: the use of drugs such as spironolactone, captopril, etc. to treat heart failure, after the control of the symptoms of the signs also weakened. 3. Bronchodilatation: use of drugs such as ceftazidime to control infection, salbutamol to improve airflow limitation. 4. Bronchitis: use roxithromycin to control infection, use bromhexine to expectorate, aminophylline to calm asthma. 5. Misaspiration of foreign body: consult a doctor in time, choose the appropriate equipment for removing the foreign body under the doctor’s judgment to relieve the airway obstruction as early as possible. When croup occurs, we should consult a doctor in time to find the cause of the disease, target medication and treatment to avoid serious complications.