The clinical presentation of croup is marked by a gradual onset of symptoms over the course of several days. It typically begins with mild upper respiratory symptoms, such as a runny nose, nasal congestion, and low-grade fever. After one to two days, the more classic symptoms of croup emerge, including a barking cough, hoarseness, and stridor. The cough, often described as "seal-like," is distinctive and usually worse at night. The stridor may initially be heard only with agitation or crying but can progress to being present at rest in more severe cases.
In mild to moderate cases, the child may have mild respiratory distress, but they are usually alert and able to maintain adequate oxygenation. In severe cases, however, the child may exhibit significant signs of respiratory distress, including rapid breathing (tachypnea), nasal flaring, and retractions of the chest muscles. The presence of cyanosis, especially around the lips, is a concerning sign that indicates the child is not getting enough oxygen and may be nearing respiratory failure.
Children with croup may also assume a characteristic posture to help ease breathing. This is often referred to as the "tripod position," where the child sits upright, leaning slightly forward, with their chin thrust out in an attempt to maximize airway patency. Despite the alarming nature of the symptoms, it is important to avoid agitating the child, as this can worsen their distress and increase the severity of the stridor.
