How long does croup last?

The course varies with the child's age, the severity of airway swelling, and the illness causing it. Symptoms may be more noticeable at night. Improvement should be gradual: breathing becomes quieter, the child rests more comfortably, and drinking returns toward normal.

Croup commonly begins with cold-like symptoms, followed by a barking cough, hoarseness, or stridor. The cough may remain after the child seems better. A lingering cough alone is less concerning when breathing is comfortable, energy is returning, and fluids are being taken.

Symptoms that are not settling, return after improving, or continue with noisy breathing need review. A clinician may consider another cause, such as a common cold with cough, and will assess the child's breathing rather than judging duration alone.

Keep the child calm, hold them upright if that is more comfortable, and offer small, frequent drinks. Check breathing and hydration regularly. Follow any treatment plan provided after a child health consultation, including instructions for prescribed medicine.

Avoid hot steam and smoke exposure. Do not start antibiotics or over-the-counter cough medicine without professional advice. If symptoms are mild but you are unsure whether recovery is progressing, arrange a clinician review and describe when the cough and noisy breathing occur.

Get emergency help if the child is working hard to breathe, has pulling in around the ribs or neck, develops blue or grey lips, cannot swallow, is drooling with breathing difficulty, or becomes difficult to wake. Do not wait for the cough to last longer before acting on these signs.

Seek prompt medical advice for stridor while resting, worsening symptoms, poor fluid intake, or fewer wet nappies. A clinician may recommend assessment in person and, when appropriate, treatments such as nebuliser treatment. Keep watching the child while arranging care.

Ask how long the current symptoms should be watched, which breathing sounds are urgent, and how to check hydration. You can also ask whether the child needs a child health consultation, whether a nebuliser treatment is appropriate, and what to do if the cough returns overnight.