This podcast presents an approach to asthma in preschoolers. Listeners will learn how asthma is defined, review the importance of early diagnosis, and master the diagnostic criteria of asthma in a preschooler in the setting of either an acute exacerbation or a non-acute care visit. Further, the recommended appropriate asthma treatment strategies in preschool children will be discussed, as well as when to consider a trial of cessation of asthma controller in preschool children. This podcast was developed by Dr. Dayae Jeong, a pediatrics resident at the University of Toronto, and Dr. Francine Ducharme, pediatrician and past co-chair of the Asthma Assembly of the Canadian Thoracic Society.