Asthma in children is usually listed in the Department of Respiratory Medicine, and for general hospitals can be listed in the Department of Pediatrics. Asthma is the most common chronic respiratory disease in childhood, and its incidence has been increasing in recent years. Bronchial asthma is mainly characterized by recurrent episodes of cough, wheezing, shortness of breath and chest tightness, which can be relieved by itself or after treatment, and is mainly characterized by airway hyperresponsiveness. The pathogenesis of bronchial asthma is very complex and is related to immune factors, neuroendocrine and genetic factors. Common risk factors for asthma, such as inhalation of allergens, food allergens, respiratory infections, dramatic mood changes, exercise and hyperventilation, cold air stimulation, specific medications and specific gases, may trigger asthma in children when stimulated by these allergens. The typical manifestation of bronchial asthma is wheezing, which is characteristic and often recurrent. The wheezing is slightly milder during the day and worsens at night or in the early morning. The child may also present with coughing and coughing up sputum, which can discharge large amounts of frothy sputum, and may present with dyspnea and chest tightness, mainly in the form of expiratory dyspnea. Asthma is quite harmful to children and can affect their physical and mental development, and affect thoracic development. It can lead to barrel chest in the long term, affecting the child’s sleep, normal activities and quality of life, and can also affect lung function. If a child has symptoms of asthma, parents must take the child to a respiratory medicine department or pediatric internal medicine department of a general hospital in a timely manner.