What is the most common cause of chronic cough in children?

The most common cause of chronic cough in children is asthma. Asthma is a respiratory condition characterized by chronic inflammation and narrowing of the airways, which can lead to persistent coughing, especially at night or after exercise. In children, cough is often the primary symptom of asthma, and it may be triggered by various factors, including allergens, respiratory infections, and environmental irritants.

Asthma-related cough is typically dry and may be accompanied by wheezing and shortness of breath. The prevalence of asthma in the pediatric population makes it a critical consideration when evaluating chronic cough in children. Identifying and managing asthma can significantly affect a child's quality of life, and addressing this underlying condition often resolves the chronic cough.

While allergic rhinitis and gastroesophageal reflux can contribute to coughing, they are less frequently the primary cause compared to asthma. Smoking exposure is also a risk factor for respiratory issues in children, but it is not as common a direct cause of chronic cough as asthma itself.