Nasal Flaring sign in children.

• A. Nasal Flaring
• B. Stridor
• C. Bradypnea
• D. Wheezing

Answer: (A)

In children, a key indicator of respiratory distress is the work of breathing, and nasal flaring is a classic visible sign of that increased effort. When a child struggles to inhale, the nostrils widen—the alae of the nose flare outward—to help pull air through a narrowed airway. This reflexive widening reflects higher airway resistance or fatigued breathing muscles and is commonly seen with illnesses that tighten or irritate the airways, such as bronchiolitis, pneumonia, or an asthma flare.

Stridor is a high-pitched sound from upper airway obstruction and isn’t the same visual cue as nasal flaring. Bradypnea means slower-than-normal breathing and doesn’t indicate the same distress pattern. Wheezing is a whistling sound from narrowed lower airways and is not the visible nostril widening described here. Thus, nasal flaring best signals respiratory distress in children.