Wheezing in an 18-month-old

It is often clearest while the child breathes out, although rattling from the nose or throat can sound similar. A clinician can listen to the chest and assess oxygenation, hydration, and the work of breathing.

Viral bronchiolitis commonly presents in young children with cough, feeding difficulty, faster breathing, and wheeze or crackling chest sounds. Repeated episodes, particularly with eczema, allergies, or a family pattern of asthma, may prompt an assessment for asthma, although diagnosis at this age can require observation over time.

A sudden cough or wheeze during eating or play raises concern that something entered the airway. Rapid wheezing with hives, facial swelling, vomiting, or collapse can occur with anaphylaxis and is an emergency.

Keep your child upright and calm, offer small frequent fluids if they can drink comfortably, and keep them away from smoke, incense, and aerosol sprays. Watch their chest and abdomen while they are settled so you can judge whether breathing effort is increasing.

Use a prescribed reliever and spacer only according to your child's treatment plan. Do not give another person's inhaler, start leftover antibiotics, or arrange nebuliser treatment without clinical direction. If possible, take a short recording of the sound for the consultation.

Call emergency services if the lips or face look blue or grey, breathing pauses, your child is floppy or difficult to wake, there is severe chest or neck pulling, they cannot cry or drink because of breathlessness, or wheeze follows possible choking or a severe allergic reaction.

Seek same-day medical advice for a first wheezing episode, persistent fast or laboured breathing, fewer wet nappies, poor drinking, worsening cough, or a child who seems increasingly unwell. Urgency is based on breathing and general condition, not on which diagnosis seems common.

Describe when the sound began, whether it started suddenly, any fever or runny nose, possible choking, new foods or medicines, and previous episodes. Ask how to recognise worsening breathing, whether an inhaler trial is appropriate, and when your child should be checked again.