Children with asthma with laryngeal cries should have a detailed medical history (including the trigger, the number of attacks, the duration of each attack, the time pattern and seasonality of the attacks, previous treatment measures and response to treatment) to understand their own and family history of allergies. Examination criteria for children with asthma with laryngeal sound: 1, age ≥ 3 years, wheezing is recurrent (or can be traced to some allergens or irritants). 2, wheezing sounds predominantly in the expiratory phase are heard in both lungs during an attack, and the expiratory phase is prolonged. 3.Bronchodilators have significant efficacy. 4.Except other diseases causing wheezing, chest tightness and cough. For suspected asthma in all age groups with simultaneous laryngeal sounds in the lungs, any of the following bronchodilator tests may be performed: 1. Aerosol or solution nebulized inhalation with β2 agonists. After 15 min of any of the above tests, if wheezing is significantly relieved and lung laryngeal sound is significantly reduced, or FEV1 is improved by ≥15%, a positive bronchodilator test can be performed for the diagnosis of asthma laryngeal sound.