Asthma in children is an obstructive respiratory condition characterized by recurring attacks of wheezing, shortness of breath, prolonged expiration, and an irritated cough that is a common, chronic illness in childhood. Although the disease can begin in infancy, it is often difficult to diagnose asthma in young children. Nevertheless, these children require treatment.

The lung is the main organ of the respiratory system and its main function is respiration (exchange of gases between the...