How to Treat a Burn

Burns look simple — damaged skin, treat the skin — but they’re among the more complex injuries in first aid. A burn destroys the body’s protective barrier, and with it the ability to hold in fluid, keep out infection, and regulate temperature. That’s why a serious burn is never just a skin problem: the dangers that follow — dehydration, shock, hypothermia, infection — can matter as much as the burn itself.

Burns come from three main sources. Thermal burns — flame, hot surfaces, scalding liquid or steam — are the most common. Chemical burns come from acids, alkalis, and strong cleaning agents, and keep burning as long as the chemical stays on the skin. Electrical burns are the deceptive ones: the visible marks can be small while the current has damaged tissue deep along its path through the body.

This lesson covers how to assess a burn, the immediate treatment steps, the myths that make burns worse, the special handling each burn type needs, and the aftercare that follows. Related lessons in this topic cover bleeding control, choking, and the rest of the first-aid fundamentals.

First, assess the burn

Before treating anything, take five seconds to answer three questions — they decide everything that follows:

1. Is the scene safe, and is the burning stopped? You can’t help while the hazard is live. Move the person from the heat source; if clothing is on fire, stop, drop, and roll; for electrical injuries, confirm the power is off before you touch anyone; for chemicals, avoid contact yourself.

2. How deep is it? Depth is what the “degrees” measure — the table below shows how to tell them apart at a glance.

3. How big is it, and where is it? Size and location drive the medical-help decision more than pain does. A small burn on a forearm and the same burn on a face are different emergencies.

With those three answers, you know whether you’re treating a minor burn at home or stabilizing someone while 911 is on the way.

How to Treat a Burn: Step-by-Step

1. Stop the burning. Move the person away from the source. Stop, drop, and roll for burning clothing.

2. Remove jewelry and loose clothing near the burn right away, before swelling starts. Do not pull off clothing that is stuck to the burn — cutting around it is fine; tearing it free takes skin with it.

3. Cool the burn under cool running water for at least 10 minutes — 20 minutes is better. Cool means cool: not cold, and never ice.

4. Cover the burn loosely with a sterile non-stick dressing or clean cloth. No tight wrapping, no fluffy materials that shed fibers into the wound.

5. Manage pain with an over-the-counter reliever such as ibuprofen or acetaminophen, following the label.

6. Watch the person, not just the burn — for anything beyond a small minor burn, monitor for the warning signs in the sections below, and get medical help whenever you’re unsure. It is always better to have a burn ruled minor than to undertreat a serious one.

First, second, and third degree: how to tell them apart

The degrees describe depth — and depth determines both how a burn looks and how it must be treated.

Some medical sources also describe fourth-degree burns, which extend into muscle and bone. Everything at that severity is a 911 call — the distinction matters to surgeons, not to first aid.

What to put on a burn — and what to keep off it

After cooling, a minor burn needs very little: a thin layer of aloe vera gel or a gentle moisturizer, then a non-stick sterile dressing. Petroleum jelly is also acceptable on a minor burn once it has been properly cooled.

The reason the list is short: burned skin has lost its barrier, so anything you apply is effectively going into the wound. That’s also why nearly every kitchen remedy your grandmother swore by makes things worse — they add heat retention, bacteria, or irritation to skin that can no longer defend itself.

The same logic retires the rest of the folk pharmacy: egg whites (salmonella risk on open skin), vinegar (acid on damaged tissue), and kitchen honey (not sterile — medical-grade honey exists, but it is not what’s in your pantry).

The dangers after the burn: fluid loss, shock, and cold

A burn that covers a significant area keeps causing trouble after the burning stops. Burned skin leaks — the body loses water steadily through evaporation and weeping from the damaged surface — and that fluid loss can tip a victim into dehydration and shock. At the same time, skin that can’t regulate temperature lets body heat escape, so burn victims chill easily: hypothermia is a real risk even indoors, and it’s the reason severe burns are covered and kept warm rather than soaked.

While you wait for help with any serious burn:

• Keep the person warm — cover unburned areas, keep them out of drafts, and never immerse a large burn in water.

• Watch for shock: pale or clammy skin, rapid weak pulse, shallow breathing, confusion, or faintness. Lay the person down and treat shock if it appears.

• Watch for dehydration as time passes: thirst, dizziness, reduced urination.

• Seek medical attention immediately if any of these appear — they signal the burn is affecting the whole body, not just the skin.

Burns in children and babies

Children are not small adults when it comes to burns. A child has more skin surface area relative to their body weight than an adult, which means the same size burn removes proportionally more of their protective barrier — they lose fluid faster, lose heat faster, and slide toward shock sooner. Their skin is also thinner, so the same heat burns deeper: a scald that would redden an adult’s arm can blister a toddler’s.

The practical rules:

• Any burn on a baby or young child gets medical attention — always, regardless of how minor it looks.

• Scalds from hot drinks, bathwater, and stovetop spills are the most common childhood burns; treat with cool running water like any thermal burn, and remove soaked clothing quickly.

• Watch a burned child especially closely for the shock and chilling signs above — everything in the previous section happens faster in a small body.

When a burn needs a doctor — and when it needs 911

See a doctor promptly for any burn that is:

• Larger than 3 inches (8 cm) across

• On the face, hands, feet, genitals, buttocks, or over a major joint

• Second-degree on a critical area, or any burn you’re unsure about

• Showing signs of infection: increasing pain after the first day, spreading redness, swelling, pus, or fever

• On an infant, young child, or elderly person — per the section above

Call 911 for:

• Any third-degree burn

• Electrical burns — including lightning; internal damage can be far worse than the skin shows

• Chemical burns to the eyes or covering a large area

• Burns with smoke inhalation — trouble breathing after a fire is an emergency even if the visible burns are small

• A burn that wraps all the way around an arm, leg, chest, or neck

• A burn victim showing shock signs, confusion, or trouble breathing

Treating each burn type

Chemical burns. Brush off any dry chemical first, then rinse the area under running water for at least 15–20 minutes, removing contaminated clothing as you rinse — the burn continues as long as the chemical stays on the skin. For chemicals in the eye, rinse the open eye continuously and get emergency care. Bring the chemical’s container or name to the ER if you can.

Electrical burns. Do not touch the person until you are certain the power source is off. Electrical current damages tissue along its path through the body, so small entry and exit marks can hide serious internal injury — every electrical burn gets medical evaluation, and 911 for anything beyond the most trivial contact.

Scalds (hot liquid and steam). Treat as a thermal burn — cool running water first — and remove soaked clothing quickly, since wet fabric holds heat against the skin.

Sunburn. Cool showers, moisturizer or aloe, hydration, and pain relievers. Blistering sunburn over a large area, or sunburn with fever, chills, or confusion, needs medical care.

Grease burns. Never water on a grease fire — smother it. On the skin, treat as a standard thermal burn once the source is controlled.

Aftercare: healing and what to expect

Minor burns heal well with a little patience and protection:

• First-degree burns typically heal in 3–5 days, often with some peeling — like a sunburn.

• Superficial second-degree burns typically heal in 2–3 weeks with proper care; deeper second-degree burns take longer and may scar.

• Keep healing burns clean, moisturized, and covered, and change dressings as directed.

• Keep new skin out of the sun — it burns and darkens easily; use sunscreen on healed burns for at least the next year.

• Watch the healing, not just the calendar: see a doctor if healing stalls, pain increases after the first day, or any infection sign appears — spreading redness, swelling, pus, or fever.

A burn that was treated promptly and cooled properly gives the skin its best chance of healing without scarring. That first ten minutes under cool running water is the cheapest medicine in this whole lesson.

Put it into practice

Training scenario:

At a backyard barbecue, your roommate grabs the grill’s side shelf to steady it — not realizing it’s been over the coals. He yanks his hand back with a shout. The palm is bright red and starting to blister across two fingers. Someone is already digging in the fridge yelling “we need butter!” and someone else is filling a bowl with ice water. He’s gritting his teeth, asking you what to do.

Walking it through: both helpers are about to make it worse — butter traps heat in the burn, and ice adds a cold injury on top of it. Get his hand under the cool running water at the outdoor faucet or kitchen sink and keep it there for at least 10 minutes — that’s the whole first act, and it will feel long. While the water runs, read the burn: blisters mean second-degree. Size and location decide the next call — blisters across two fingers sit near the “joints and hands” line, so once it’s cooled and loosely covered with something clean and non-stick, this one is worth a same-day medical look. Leave every blister intact. No butter, no ice, no debate — cool water, cover, check the severity, and know which burns get a doctor.