Recognising a Medical Emergency
The most important first-aid skill is knowing when something is a true emergency. This guide helps you recognise the warning signs of serious conditions — so you can act fast and call for help.
The warning signs of heart attack, stroke, severe allergic reaction, and other emergencies, plus a calm, clear framework for when and how to call 911.
What's inside
- →Heart attack signs — what to notice
- →Stroke — think FAST — Face, Arm, Speech, Time
- →Severe allergic reaction — anaphylaxis signs
- →Trouble breathing — when it's urgent
- →Calling 911 well — what to say
- →While help is coming — staying calm
For educational purposes only
This guide is educational information about first aid and home safety — it is not medical advice, and it is not a substitute for professional medical care or hands-on, certified first-aid and CPR training. It does not diagnose, treat, or replace emergency care. Knowing first aid saves lives, but reading about it is not the same as being trained — consider a certified course (for example through the Red Cross or St John Ambulance). In any emergency, call 911 (or your local emergency number) immediately and follow the dispatcher's instructions.