Early symptoms of asthma in children are cough, chest tightness, etc. In acute asthma attacks, rales, dyspnea and other manifestations can occur. Asthma in children in the early stage of the disease is usually mild symptoms, manifested as cough, chest tightness, tightness of breath, wheezing, etc. Coughing often occurs at night or early in the morning, with a dry cough, but also a small amount of white mucous sputum; wheezing occurs at night or early in the morning, manifested in the thicker out of the breath and other characteristics. Acute attacks of asthma can also occur at an early stage, when there is a rumbling or wheezing sound during breathing, frequent coughing, dyspnea, shortness of breath, sit-up breathing, obvious triple concave signs, and pallor, among other manifestations. The rumbling sound is similar to a whistle, which is related to the airflow through the narrowed bronchial tubes; the three concave signs, i.e., the depression of the suprasternal fossa, supraclavicular fossa, and the intercostal space, may appear during inhalation. It is recommended to consult the doctor in time after the early appearance of corresponding symptoms. Early and regular treatment after clarifying the cause and diagnosis can slow down the progress of the disease and improve the clinical symptoms.