What is a common characteristic of croup, a respiratory disease often seen in children?

Croup is characterized by a distinctive "barking" cough, which is often described as resembling the sound of a seal. This cough is caused by inflammation of the larynx and trachea that occurs with the illness. The inflammation leads to narrowing of the airway, which contributes to the barking sound when the child coughs.

In contrast to the other symptoms listed, such as a high fever, chest pain, or difficulty swallowing, the barking cough is specifically unique and indicative of croup. While children with croup may experience varying levels of fever or respiratory distress, the hallmark symptom that commonly defines the condition is indeed that characteristic cough. Recognizing this symptom can help healthcare providers promptly identify croup and initiate appropriate care.