Choking happens when something blocks the airway and air cannot move properly in or out. In first aid, choking needs quick action because a complete blockage can stop a person from breathing.
What does choking mean?
A choking person has something stuck in the airway. That blockage may be partial or complete.
- A partial blockage means some air is still getting through.
- A complete blockage means the person may not be able to breathe, cough, or speak.
What are the signs of choking?
Signs can include:
- sudden trouble breathing
- inability to speak properly
- ineffective coughing
- clutching at the throat
- panic
- noisy breathing
- blue lips or face
What should you do in first aid?
If the person can cough strongly, encourage them to keep coughing.
If they cannot cough, speak, or breathe properly:
- Call
000or have someone else call. - Give back blows.
- If the blockage does not clear, follow the standard choking first aid sequence.
- Keep going until the blockage clears or the person becomes unresponsive.
What if the person becomes unresponsive?
If the person becomes Unresponsive:
- Call
000if this has not already been done. - Start CPR.
- Continue until help arrives or the person starts breathing normally.
How is choking different from airway obstruction?
Choking is the plain-English emergency term most people recognise.
Airway Obstruction is the broader technical term for blocked airflow. On this site, choking is the more practical first aid page for immediate action.
Quick answer
Choking means the airway is blocked and air cannot move properly. If the person cannot cough, speak, or breathe, act quickly, call 000, and start CPR if they become unresponsive.
How this page is checked
Publisher: First Aid Glossary Editorial Team
Last reviewed: 28 April 2026
Reviewed against: ANZCOR Guideline 4 – Airway, Healthdirect Australia choking guidance, and Triple Zero emergency-call guidance.
This page is educational and explains first aid language in plain English. It is not personal medical advice, diagnosis, or a replacement for accredited first aid training. In an emergency in Australia, call Triple Zero (000).
Sources reviewed
Reviewed against Australian 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.
