Which of the following is a common symptom of croup?

• A. Wheezing
• B. Stridor
• C. Chest tightness
• D. Excessive sweating

Answer: (B)

Stridor is a high-pitched, wheezing sound that occurs when breathing in, typically caused by an obstruction of the airway. In the context of croup, which is primarily a viral infection leading to inflammation of the larynx and trachea, stridor is a hallmark symptom. It signifies a narrowing of the upper airway, and is most noticeable when the child is in an upright position or agitated. Therefore, the presence of stridor is significant in diagnosing croup, as it correlates with the degree of airway involvement and helps healthcare providers determine the severity of the condition.

Wheezing, while it can also occur in respiratory conditions and may indicate lower airway issues such as asthma or bronchiolitis, is not the defining characteristic of croup. Chest tightness is more commonly reported in association with conditions affecting the lower airways, such as asthma. Excessive sweating is not typically associated with croup but may be seen in different fever-related illnesses. Therefore, stridor stands out as the key symptom indicative of croup and its physiological implications.