Asthma in children has no obvious symptoms between attacks, and the symptoms during an attack include coughing, wheezing, chest tightness, dyspnea and so on. 1. Cough, wheezing: manifested as paroxysmal attacks, often at night and early in the morning or aggravation. 2. Chest tightness: chest tightness can also occur during an acute asthma attack in children. 3. Difficulty in breathing: the attack is characterized by dyspnea, prolonged expiratory phase with rales. Severe cases of sitting breathing, fear and anxiety, sweating, blue and gray, and even a direct threat to life safety. The above symptoms are characterized by the fact that they can occur within minutes and last for hours to days, can be relieved by treatment or on their own, and often occur or worsen at night and in the early hours of the morning. Parents should bring their children to the hospital in time when the above symptoms occur, and under the guidance of doctors for targeted treatment and standardized treatment.