What is a common complication associated with croup?

The common complication associated with croup is difficulty breathing. Croup is characterized by inflammation and swelling in the upper airways, primarily affecting the larynx and trachea, which leads to symptoms such as a distinctive barking cough, stridor (a harsh, raspy breathing sound), and hoarseness. As the airway narrows due to this inflammation, the child may experience significant difficulty breathing, especially when agitated or during nighttime.

While pneumonia, ear infections, and dehydration can occur in children with croup, they are not directly linked to the condition as complications in the same immediate sense. Difficulty breathing is a hallmark issue arising directly due to the airway obstruction caused by the inflammation, making it the most pertinent and common complication associated with croup.