First Aid Myths vs Facts
What You Think You Know Could Actually Hurt You
Most of us grew up learning first aid from parents who learned it from their parents. The problem? A lot of it was wrong then, and it's still wrong now.
Picture the scene. Your kid grazes their knee, and without thinking, you reach for the rubbing alcohol. Or someone at the dinner table starts choking and you instinctively tell them to raise their arms. Or there's a nosebleed and you tilt their head back.
All of these feel right. They're the things we were taught, passed down through kitchens and schoolyards for generations.
And almost all of them are wrong. First aid myths are everywhere — and unlike most myths, these ones have real consequences. Outdated advice can slow healing, worsen injuries, or in serious situations, cost someone their life.
So let's clear the air. Here's what you actually need to know.
WOUND CARE
MYTH "Let a wound air out — don't cover it"
The fact:
It feels intuitive — expose it to air, let it breathe, let it scab. But wounds actually heal faster in a moist, covered environment. When a wound dries out and scabs over, that scab acts as a physical barrier that new skin cells have to work around, which slows the process.
What to do instead:
Clean the wound, apply a thin layer of antibiotic ointment to maintain moisture, and cover with a clean non-stick dressing. Change it daily or when wet or dirty.
MYTH "Lick a wound to clean it"
The fact:
The human mouth carries hundreds of bacterial species — some of them genuinely harmful, including Staphylococcus aureus. Licking a wound doesn't clean it; it deposits bacteria directly into broken skin where they can cause infection.
What to do instead:
Rinse with clean running water or saline. That's it. No saliva, no alcohol, no hydrogen peroxide.
BURNS & BLISTERS
MYTH "Pop the blister to help it heal"
The fact:
The fluid inside a blister is doing an important job — it's cushioning the damaged tissue underneath and creating a sterile environment for healing. Popping it removes that protection, exposes raw skin, and significantly raises the risk of infection.
What to do instead:
Leave it intact if you can. If it's in a location where it will burst anyway (like the heel of the foot), clean the area, drain it carefully with a sterilised needle from the side — don't remove the roof of the blister — and cover with a clean dressing.
CHOKING
MYTH "Raise their arms above their head"
The fact:
This is one of the most common responses to choking and there is no evidence it helps. None. The arms-up position does nothing to dislodge an airway obstruction. It's likely a well-meaning instinct that has simply been passed on uncritically for generations.
What to do instead:
Encourage them to cough if they can. If they can't, give up to five firm back blows between the shoulder blades with the heel of your hand. Follow with up to five abdominal thrusts (Heimlich manoeuvre). Alternate between the two until the object is dislodged or emergency services arrive.
MYTH "Give them water to dislodge it"
The fact:
When someone is choking, their airway is blocked — which means they cannot swallow. Trying to make them drink water while choking risks the water entering the airway alongside the obstruction, making things significantly worse.
What to do instead:
Back blows and abdominal thrusts. Call 000 if the obstruction doesn't clear quickly.
HEAD INJURIES
MYTH "Keep them awake after a head knock"
The fact:
This is one of the most persistent myths in first aid — the idea that if someone with a concussion falls asleep, they might slip into a coma and not wake up. Medical evidence does not support this. Sleep itself is not dangerous after a concussion.
The origin of this advice was likely a reasonable but misunderstood concern: if someone is losing consciousness rapidly after a head injury, that's a serious sign that needs emergency attention. Keeping them awake doesn't prevent that — it's a symptom to watch for, not something sleep causes.
What to do instead:
Allow them to sleep if they need to — the brain heals during sleep. What matters is monitoring for worsening symptoms: severe headache, repeated vomiting, one pupil larger than the other, increasing confusion, or difficulty staying conscious. Any of these warrant an immediate call to 000.
BROKEN BONES
MYTH "If you can move it, it's not broken"
The fact:
Fractures don't always prevent movement, especially in smaller bones like those in the hands, feet, and toes. Some fractures (called stress fractures or hairline fractures) are painful but allow fairly normal movement. The ability to wiggle fingers or toes is not a reliable indicator that nothing is broken.
What to do instead:
If there's significant pain, swelling, bruising, or a mechanism of injury that could have caused a break — treat it as a potential fracture. Immobilise the limb, apply ice wrapped in cloth, and seek medical assessment. An X-ray is the only way to know for certain.
Why This Matters More Than You Think
Getting first aid wrong doesn't always feel dramatic in the moment. You butter the burn and it seems fine. You tilt the head back and the nosebleed appears to stop. Nothing catastrophic happens — this time.
But the stakes aren't always low. And in the moments when they aren't, the difference between the right response and the wrong one can be significant.
Quick Reference: Myth vs Fact
The One Investment Worth Making
Reading this is a start — but there's no substitute for a proper first aid course. A few hours with a qualified instructor gives you hands-on practice that sticks in a way articles simply can't replicate.
Most communities offer free or low-cost sessions through Red Cross, St John Ambulance, and local health services. It's worth a Saturday morning — for your family, and for anyone who might need you.