Children with the following symptoms must be highly suspected of having asthma: 1. recurrent nighttime coughs, wheezing or morning coughs, wheezing, or wheezing that become episodic and mostly resolve on their own; 2. irritating smells, such as smoke, fumes, pollen, paint, and coughing or coughing that increases after activity; 3. recurrent colds that do not resolve for more than 10 days; 4. chronic coughs that occur after a cold and Itchy throat; 5. Frequent colds with runny nose, nasal congestion, sneezing or itchy skin; 6. Repeated pneumonia associated with the alternation of seasons; 7. Restless sleep at night, frequent nose and eye rubbing during the day, and similar family history of the disease.