If a child has recurrent episodes of coughing, wheezing, chest tightness, or shortness of breath, the attack is often preceded by symptoms such as nasal congestion, runny nose, sneezing, followed quickly by wheezing, severe coughing, and sometimes tightness in the chest and chest tightness, which can be both or some of these symptoms. At this time, if you hear a whirring sound in the trachea, accompanied by prolonged expiration and dyspnea, and these symptoms often occur mainly at night or early in the morning, it may be an asthma attack. It is also helpful to follow up the medical history of such children, whether they had eczema or rhinitis as a child, whether they have a history of allergic body, whether they have allergic parents at home, whether they have allergic rhinitis, and whether they have asthma patients. Such a child should routinely be given a pulmonary function test if he arrives at the hospital. If the pulmonary function shows abnormalities or if the allergens show positive, this child can be identified as asthmatic.