1, pediatric allergic asthma inquiry check: (1) had a history of allergy: such as infant eczema, allergic rhinitis, urticaria, food or drug allergies. (2) Triggers: colds, climate change, fatigue, food, drugs, smoke, toys, pollen, etc. can be triggered. (3) Type of attack: season, hour, disease trend, duration, etc. (4) Previous medications: antiallergic drugs, beta 2 agonists, adrenocorticotropic hormones, aminophylline, etc. (5) Family history: history of asthma in close relatives, history of allergy, family environment, parents of asthma personnel, etc., the impact on children’s schooling, physical fitness, psychology, etc., and the impact on parents’ work and economy. 2, pediatric allergic asthma symptoms: (1) aura symptoms: often itchy nose, sneezing, nasal congestion, runny nose, itchy eyes, itchy throat, chest tightness, dry cough. (2) Typical episodes: cough, shortness of breath, wheezing, chest tightness, dyspnea, prolonged expiration, sitting breathing, cyanosis, sweating, fever, etc. Some may cough as the only symptom. Some may cough as the only symptom. In severe cases, there may be headache, dizziness, anxiety, confusion, incontinence, drowsiness, coma, respiratory failure, and so on. If there is obvious chest pain, the possibility of pneumothorax on one side of chest pain should be considered. (3) Nocturnal attacks: Asthma is prone to attacks at night. Some of them only have coughing, and some of them have typical attacks. The causes are related to inhalation of allergens, uneven use of medication and lowered temperatures. Vagus nerve excitation at night also has a certain relationship. 3, pediatric allergic asthma signs of examination: (1) chest signs: the chest can be symmetrical over-inflated, over time can be chicken chest or barrel chest, respiratory motility is weakened. There is a drumming sound on percussion. Auscultation of the lungs has obvious rales, and wet rhonchi can be heard when the attack is prolonged or combined with infection. When there is severe airway obstruction, or when the respiration is shallow and slow due to systemic failure, or when there is a pneumothorax, the rales may decrease or even disappear. In remission or atypical asthma, there may be no obvious abnormal signs. (2) Other signs: in severe attacks, physical activity can be limited, dyspnea, sitting breathing, incoherent speech, lips, fingers and toes cyanosis, fast pulse or arrhythmia, three concave signs, and in severe cases, there is severe dehydration, drop in blood pressure, systemic failure, coma and so on. 4.Laboratory examination of pediatric allergic asthma: (1) blood test: eosinophils can be seen to increase, neutrophils increase, combined with infection, the total number of white blood cells and neutrophils can be significantly higher. (2) Blood test: Immunoglobulin E (IgE) is elevated in serum. Arterial blood gas analysis: arterial partial pressure of oxygen decreases, partial pressure of carbon dioxide increases, blood oxygen saturation decreases, and blood PH value decreases. (3) Lung function test: 1-second forceful expiratory volume (FEV1) can be easily measured, showing a decrease in maximal respiratory flow (PEF), a decrease in lung volume, and an increase in airflow resistance. 5, pediatric allergic asthma chest X-ray: chest X-ray can detect pneumonia, pneumothorax, mediastinal emphysema, tuberculosis and other comorbidities. 6, pediatric allergic asthma fiberoptic bronchoscopy: fiberoptic bronchoscopy can be seen mucosal edema, thick secretions, mucosal inflammation, sputum, pus tethered or foreign body.