What is one common characteristic of croup?

One common characteristic of croup is the seal-like barking cough. This distinctive cough is a result of inflammation in the upper airways, which narrows the airway and creates a sound similar to a seal barking when the child coughs. Croup typically affects children and is often associated with viral infections, leading to this unique symptom as the airway becomes constricted due to swelling.

Recognizing the barking cough is crucial for distinguishing croup from other respiratory conditions, as it can indicate the need for specific interventions and treatments aimed at reducing airway inflammation and improving breathing. The other options do not accurately reflect the hallmark symptoms of croup; for instance, while fever may occur, it is not characteristic enough to define croup, and green nasal discharge is more indicative of sinusitis or a different upper respiratory infection, rather than croup itself. Rapid onset of wheezing is also typically associated with conditions like asthma or bronchospasm rather than croup.