A burn needs cool running water, not ice, butter, or toothpaste. Start cooling the area under cool running water for 20 minutes as soon as you can, then cover it loosely with a clean, non-stick dressing. That single step — prompt, sustained cooling — does more to limit damage than anything else you can do at home.
Most household burns are minor and heal with basic care. Some are not. Knowing the difference matters, because the wrong first move can make a burn worse, and waiting too long to get medical help can turn a small problem into a serious one.
What should you do first when you get a burn?
Cool the burn under cool running water for 20 minutes. This is the single most important thing you can do in the first moments, and it is supported by burn care guidance from major health bodies.
Use cool water, not cold. Not ice. Not ice water. Ice and ice-cold water constrict blood vessels and can injure tissue further, adding a cold injury on top of a heat injury. Tap water at a comfortable cool temperature is what you want.
Start cooling as soon as possible. Cooling is most effective within the first 20 minutes after injury, though it can still help up to about three hours afterward. If you are unsure how long ago the burn happened, cooling is still reasonable if the skin is intact.
While you cool the burn:
- Remove clothing and jewelry from the area — but only if it is not stuck to the skin. If fabric is stuck, leave it and let a clinician remove it.
- Do not break blisters. Blisters are a sterile barrier. Opening them invites infection.
- Do not apply butter, oil, toothpaste, egg white, or ice. None of these help, and several can cause harm or infection.
- Keep the rest of the person warm. Cooling a large burn area can drop body temperature, especially in children and older adults.
After cooling, cover the burn loosely with a clean, non-stick dressing or cling film. This reduces pain and protects the raw skin from contamination.
How do you tell if a burn is minor or serious?
Burn severity comes down to depth, size, and location. Depth is the most useful guide for a non-clinician.
Superficial burns (sometimes called first-degree) affect only the outer layer of skin. The area is red, painful, and dry, with no blisters. A mild sunburn is a good example. These usually heal within several days to about a week.
Partial-thickness burns (second-degree) go deeper and cause blisters. The skin is red, moist, and very painful. Superficial partial-thickness burns often heal in one to three weeks. Deeper partial-thickness burns take longer and are more prone to scarring and infection.
Full-thickness burns (third-degree) destroy the full depth of skin. The area may look white, waxy, leathery, or charred. A key and counterintuitive point: full-thickness burns are often less painful than partial-thickness burns, because the nerve endings have been destroyed. That lack of pain is not a good sign. It is a sign to get emergency care.
Size matters too. A rough guide many clinicians use is the person’s palm, which is about 1% of their body surface area. A burn larger than the person’s palm, or any burn you are unsure about, warrants medical assessment.
Seek emergency care for any burn that:
- Covers a large area, or is larger than the person’s palm
- Involves the face, hands, feet, genitals, or major joints
- Goes all the way around a limb or the chest
- Looks white, waxy, leathery, or charred
- Causes little or no pain in an area that should hurt
- Happened from a chemical, electrical source, or fire
- Was inhaled — smoke, hot gas, or steam in the airway
Also get help for burns in infants, young children, and older adults, and for anyone with a medical condition that affects healing or immunity.
What should you NOT put on a burn?
Skip the home remedies. This is one of the clearest areas in burn care, and the folk remedies persist anyway.
Do not use butter, grease, oil, or petroleum jelly on a fresh burn. These trap heat in the tissue, which is the opposite of what you want in the first hours. They can also hold bacteria against damaged skin.
Do not use toothpaste, baking soda, egg whites, or vinegar. None are supported by evidence, and some cause additional chemical irritation.
Do not use ice or ice water. As noted, cold injury can compound the original burn.
Do not use cotton wool or fluffy dressings directly on the burn. Fibers stick to raw tissue and are painful to remove.
Do not apply topical antibiotics routinely to a minor burn unless a clinician advises it. Over-the-counter antibiotic ointments are widely used, but routine use is not strongly supported for clean minor burns, and some people develop allergic reactions to them.
What you can use: a clean, non-stick dressing, or cling film laid in sheets (not wrapped tightly) over a larger burn while you wait for care. For pain, over-the-counter acetaminophen or ibuprofen is reasonable for most adults, following label directions. Do not give aspirin to children or teenagers because of the risk of Reye’s syndrome.
How do you care for a minor burn at home?
After the initial 20-minute cooling, most minor burns need little more than gentle care and time.
Keep the area clean and covered. Wash gently with mild soap and water once daily, then re-cover with a clean non-stick dressing. Change the dressing if it gets wet or dirty.
Leave blisters alone. If a blister breaks on its own, clean the area gently and keep it covered. Watch for signs of infection.
Signs of infection to watch for:
- Increasing pain, redness, or swelling after the first day or two
- Pus or a foul smell from the wound
- Red streaks spreading from the burn
- Fever or chills
- The burn is not improving after several days, or is getting worse
If any of these appear, contact a clinician. Minor burns can become infected, and infected burns need medical treatment.
Protect healing skin from sun. New skin is sensitive, and sun exposure can worsen scarring and cause permanent color changes. Keep it covered or use sun protection once the skin has closed.
When should you go to the hospital for a burn?
Go to an emergency department or call emergency services for burns that are large, deep, or in sensitive locations. Do not wait to see if it improves.
Call emergency services for a burn that covers a large part of the body, involves the face or airway, or came from fire, electricity, or chemicals. These carry risks beyond the skin itself — airway swelling, internal injury, or ongoing chemical damage.
For chemical burns, the priority is different. Remove contaminated clothing and flush the area with copious running water for at least 20 minutes, and longer for some chemicals. Do not try to neutralize the chemical. Get medical help, and if possible bring the chemical container or its name so clinicians know what they are dealing with.
For electrical burns, always seek medical evaluation even if the skin looks minor. Electricity can injure deeper tissues and the heart along its path, and the visible burn may understate the damage.
For any burn where you are unsure of the depth, size, or cause, err toward getting it checked. A clinician can assess it quickly, and a short visit is far better than a delayed problem.
Does cooling actually reduce burn damage?
Yes. Prompt cooling is one of the better-supported first-aid measures in medicine, and the mechanism is well understood.
Heat injury does not stop the moment the heat source is removed. Tissue keeps heating and inflammation builds in the minutes after. Cooling interrupts that process, limits how deep the injury goes, and reduces pain. This is why the timing and duration matter — cooling started early and sustained for around 20 minutes does more than a quick splash.
What the evidence does not support is the idea that any particular home remedy speeds healing or prevents scarring. Claims about oils, creams, or specialty products healing burns faster are largely marketing. No large human trials confirm those claims.
The honest position on scarring: deeper burns are more likely to scar, and good wound care reduces infection risk, but no over-the-counter product has been shown to reliably prevent scarring from a significant burn. If scarring is a concern, that is a conversation to have with a clinician.
Frequently Asked Questions
How long should you run water on a burn?
Cool the burn under cool running water for 20 minutes. Cooling is most effective when started within the first 20 minutes, but it can still help up to about three hours after the injury.
Should you put ice on a burn?
No. Ice and ice-cold water can cause a cold injury on top of the burn and make tissue damage worse, so use cool tap water instead.
Should you pop a burn blister?
No. Blisters form a sterile barrier that helps prevent infection, so leave them intact and let them heal or break on their own.
When should you go to the hospital for a burn?
Go for any burn that is large, deep, or on the face, hands, feet, genitals, or joints, and for any burn from fire, electricity, or chemicals. Burns that look white, waxy, or charred, or that cause little pain, also need emergency care.
