Wheezing is a high-pitched whistling sound that can happen when air is moving through narrowed airways. It often happens during breathing out, but it can sometimes be heard during breathing in as well. In first aid, wheezing matters because it may be a sign that the person is having trouble moving air properly.
What does wheezing mean?
Wheezing is a sound, not a diagnosis.
It can happen when the airways are:
- narrowed
- swollen
- irritated
- partly blocked
Some people wheeze mildly. In other situations, wheezing can happen as part of a serious breathing emergency.
What can cause wheezing?
Common causes can include:
- Asthma
- an Asthma Attack
- an allergic reaction
- chest infection
- smoke or irritant exposure
- a partially blocked airway
If wheezing starts suddenly and the person is very short of breath, treat it seriously.
What should you do in first aid?
- Help the person sit upright.
- Stay calm and reassure them.
- Help them use their reliever inhaler if they have asthma and have one with them.
- Watch how hard they are working to breathe.
- Get urgent help if they are worsening or not improving.
When should you call 000?
Call 000 if wheezing happens with:
- obvious breathing difficulty
- blue lips
- inability to speak properly
- severe chest tightness
- collapse
- a suspected severe allergic reaction
- signs of Respiratory Distress
If the person becomes Unresponsive and is not breathing normally, start CPR.
How is wheezing different from respiratory distress?
Wheezing is one sign that may happen when breathing is affected.
Respiratory Distress is the broader emergency pattern where the person is clearly struggling to breathe or is not getting enough air.
Quick answer
Wheezing is a whistling sound caused by narrowed or irritated airways. It can happen with asthma, allergic reactions, infections, or other breathing problems. Call 000 if wheezing is happening with serious breathing difficulty or other emergency signs.
Sources reviewed
- Healthdirect: respiratory system and urgent breathing symptoms
- Triple Zero: official emergency calling guidance
Reviewed against current Australian respiratory, first aid and emergency guidance by the First Aid Glossary Editorial Team. This article is general information and does not replace emergency-operator directions, professional medical advice or hands-on first aid training.
