Have you ever spilled hot soup and instinctively reached for ice?
Actually, that reflex is a risky mistake that can deepen skin tissue damage.
How you respond in the first few minutes after a burn can make a major difference in how deep the resulting scar becomes.
Key Takeaway
The core of burn first aid is cooling the affected area under lukewarm running water for 15 to 20 minutes right after the injury.
Applying ice directly or using home remedies like soybean paste or toothpaste raises the risk of infection and further damage.
This article walks through the full process of burn first aid—the correct response steps, symptoms by burn stage, and situations that call for a hospital visit.
✔ Cool the burn under running water for 15–20 minutes right away
✔ Ice and home remedies can make the damage worse
✔ Whether you need to see a doctor depends on blister size, location, and extent
What’s the First Thing to Do When You Get a Burn?
The first thing you should do is cool the burn under running water.
Burn first aid refers to the process of stopping contact with the heat source and lowering skin temperature to prevent further damage.
The National Health Information Portal also recommends cooling the burn under cool running water and not popping any blisters.
“Cool the burned area under cool running water for at least 20 minutes, and do not pop any blisters.”
This guidance comes from the Korea Disease Control and Prevention Agency via the National Health Information Portal.
Lukewarm tap water, around 15–20°C (59–68°F), is generally recommended for cooling the burn.
Water pressure matters too.
Water that’s too forceful can further irritate the wound surface.
So it’s safest to use a gentle, low-pressure stream of water for 15 to 20 minutes.
Remove any jewelry right away, before swelling sets in.
Once swelling occurs, it can restrict blood flow and cause bigger problems.
Avoid forcibly removing clothing.
Fabric stuck to the skin can worsen the injury if pulled off.
It’s safer to cool the area with clothing still on, then cut the fabric away with scissors.
✅ Cool the burn under running water for 15–20 minutes
✅ Don’t apply ice directly (risk of vessel constriction)
✅ Remove jewelry immediately, before swelling starts
✅ Don’t pull off clothing—cool with water first, then cut it away with scissors
Is It Safe to Put Toothpaste or Soybean Paste on a Burn?
The short answer: it’s not recommended.
A home remedy is a self-treatment method that hasn’t been medically verified.
In a panic, some people reach for toothpaste, soybean paste, or even sliced potatoes.
But these substances can trap heat in the wound and raise the risk of bacterial infection.
Pouring soju on a burn—hoping the alcohol’s evaporation will cool it—only irritates the already-damaged skin barrier further and makes the wound worse.
🚫 Don’t apply toothpaste, soybean paste, cucumber, or other foods
🚫 Don’t pour soju or alcohol directly on the wound
🚫 Don’t pop blisters yourself
🚫 Don’t self-apply unverified topical remedies
Popping a blister with your fingers is just as risky.
Blister fluid acts as a natural barrier that protects the wound from outside bacteria.
Breaking it open can lead to secondary infection, slower healing, and more severe scarring.
Leave blisters intact and keep them clean and protected.
What Are the Degrees of Burns, and How Do Symptoms Differ?
Burns are classified from first to third degree based on how deep the damage goes.
The deeper the burn, the longer the healing time and the greater the risk of scarring.
| Degree | Depth of Damage | Main Symptoms | Pain |
|---|---|---|---|
| 1st Degree | Epidermis | Redness, no blisters | Mild pain |
| Superficial 2nd Degree | Upper dermis | Red blisters | Severe pain |
| Deep 2nd Degree | Lower dermis | Pale blisters | Reduced pain |
| 3rd Degree | Full-thickness skin | Discoloration, eschar formation | No pain (nerve damage) |
Second-degree burns damage the dermis and come with blisters and significant pain.
Healing typically takes about 2 to 4 weeks, and scarring or skin discoloration can remain afterward.
When damage reaches deep into the dermis, nerve endings can be destroyed, which paradoxically means less pain is felt.
But less pain doesn’t mean the injury is less serious.
Third-degree burns destroy the full thickness of the skin, causing discoloration, and generally do not heal on their own—professional treatment is recommended.
When Should You See a Doctor After Burn First Aid?
If the burn is on the face, hands, feet, or a major joint, head to the hospital without delay.
Burns over joints can cause the skin to tighten as it heals, which may limit range of motion.
Burns covering a large area, or those affecting infants or older adults, also call for prompt medical attention.
People with weaker immunity can experience whole-body effects even from a relatively small burn.
🎯 The blister is larger than a coin
🎯 The burn is on the face, hands, or a joint
🎯 The injury was caused by chemicals or electricity
🎯 The injury occurred in an older adult or a young child
After first aid, it’s best to have your condition properly assessed at a medical facility for hygienic dressing and infection prevention.
Our hospital operates a burn treatment system intended to make care available outside regular daytime hours.
You can find more detailed treatment information at Burn Treatment — Ansan Open Surgery Hospital Home.
Frequently Asked Questions
1. When is the right time to apply ointment to a burn?
Answer: Applying ointment while the burn still feels hot can trap heat in and worsen the damage. It’s best to cool the area thoroughly with cold water, pat it dry, and then apply an infection-prevention ointment.
2. How should you care for a blister that has already popped?
Answer: Don’t peel off the blister skin—leave it in place and gently clean the area with sterile saline. Then protect it with an appropriate dressing to reduce the risk of bacterial infection and visit a hospital.
3. Why shouldn’t you put ice directly on a burn?
Answer: Direct contact with ice causes skin blood vessels to constrict rapidly, restricting circulation and potentially causing secondary damage similar to frostbite. Running water at 15–20°C (59–68°F) is generally used to cool a burn instead.
References
· Korea Disease Control and Prevention Agency, “Burns,” National Health Information Portal, 2024. View source
· National Emergency Medical Center, “Heat/Cold-Related Injuries – Burns,” National Emergency Medical Information Center (E-Gen), 2023. View source
· Nate News, “‘Ouch, That’s Hot!’ Skip the Soju and Soybean Paste While Frying Pancakes — Burn First Aid Tips,” Nate News, 2026. View source
This article is intended for general health information purposes and is not a substitute for individual diagnosis or treatment. If you have symptoms, please consult a medical professional.
