Croup congestion: what parents should know

Croup causes swelling around the voice box and upper windpipe. A blocked or runny nose may sit alongside the swelling, while the more recognisable cough is often harsh or barking. Some children make a high-pitched sound when breathing in, called stridor. This sound is more concerning when it continues while the child is calm rather than appearing only during crying.

A common cold can trigger croup-like symptoms, but congestion alone does not identify the cause. Watch the child’s colour, alertness, drinking, and breathing pattern rather than judging severity by the blocked nose.

Keep the child upright and calm; crying can make upper-airway noise and breathing effort worse. Offer frequent sips of fluid if swallowing is comfortable, clear nasal secretions gently, and stay nearby to observe breathing. Avoid smoke and do not use steam or unprescribed cough medicines. A clinician may recommend treatment after listening to the airway; a nebuliser is used only when medically indicated.

Arrange a child health consultation if the cough is worsening, sleep is repeatedly disturbed, or you are unsure whether the sound is stridor. Note when the noise occurs and whether it settles when the child rests.

Seek emergency help if the child struggles for each breath, the skin pulls in between or below the ribs, lips look blue or grey, the child is unusually sleepy, drooling prevents swallowing, or the noisy breathing persists at rest. Urgent assessment is also needed if the child cannot drink or has markedly fewer wet nappies. Keep the child upright while arranging help.

Ask whether the sound is stridor or nasal congestion, whether medicine is needed to reduce airway swelling, what signs should prompt an emergency visit, and how to support fluids and sleep tonight.