The single best thing to put on a burn immediately is cool running water, applied for a full 20 minutes. Not ice, not butter, not toothpaste. Cool tap water, run gently over the burned area as soon as possible. Research from UC Davis Health shows that cooling a burn with running water for 20 minutes within the first three hours of injury speeds up healing and improves outcomes.
Why 20 Minutes of Cool Water Matters
Twenty minutes sounds like a long time when you’re standing at the sink in pain, but the duration matters. Heat continues to damage deeper layers of skin even after the source is removed, and sustained cooling is what stops that process. Running water is better than a bowl of water or a wet cloth because the flow continuously carries heat away from the tissue.
Use cool water, not cold. Cold water or ice can constrict blood vessels and actually make the injury worse. Room-temperature tap water or slightly cool water is ideal. If you’re helping a child, make sure the water isn’t so cold that it causes shivering, which can lead to a dangerous drop in body temperature in small kids.
What Never to Put on a Burn
Butter, cooking oil, toothpaste, and egg whites are all common folk remedies that actively harm burns. They trap heat in the skin, cause irritation, and increase the risk of infection. If you’ve already applied something like this, gently rinse it off with cool running water.
Ice is another frequent mistake. It feels like it should help, but ice damages already-injured skin cells and can cause frostbite on top of the burn.
After Cooling: What to Apply Next
Once you’ve cooled the burn for 20 minutes, the next step depends on how severe it is.
A first-degree burn (like a mild sunburn) looks dry, red, and painful but has no blisters. For these, a layer of pure aloe vera gel works well. Aloe has anti-inflammatory properties that reduce redness and swelling, and its high water content keeps the skin hydrated, which can limit peeling. Apply a thick layer gently without rubbing. For extra relief, keep the aloe in the fridge so it’s cool when you apply it. Reapply throughout the day whenever the skin feels dry, hot, or itchy.
A second-degree burn goes deeper into the skin and produces blisters, moist or weeping skin, intense redness, and significantly more pain. These burns need a non-stick dressing rather than just aloe. Do not pop the blisters. They form a natural protective barrier against infection.
Choosing the Right Bandage
Regular adhesive bandages and standard gauze will stick to a burn and tear healing skin when you remove them. You need a non-adherent dressing, and several types are available at most pharmacies.
- Petrolatum gauze (Adaptic, Jelonet, Xeroform): Fine-mesh gauze coated in petroleum jelly. It keeps the wound moist, prevents sticking, and lets fluid drain through to an outer absorbent layer. This is one of the most widely used burn dressings.
- Telfa pads: These have a perforated film layer that keeps the absorbent cotton core from bonding to the wound. They’re inexpensive and easy to find at any drugstore.
- Hydrogel dressings: Gel-based sheets or tubes that add moisture to a dry burn, provide a cooling sensation, and won’t stick to the wound. Particularly soothing in the first day or two.
- Silicone dressings (Mepitel): A soft silicone layer that adheres gently to surrounding skin but not to the wound itself. These can stay in place for several days, making dressing changes nearly painless. They’re a good option for second-degree burns.
Whichever dressing you choose, cover the non-stick layer with a light wrap of standard gauze or a self-adhesive bandage to hold it in place. Change the dressing daily or whenever it gets wet or dirty.
Managing Pain at Home
Burns hurt, and there’s no reason to tough it out. Over-the-counter ibuprofen (Advil, Motrin) or naproxen (Aleve) reduces both pain and inflammation. Acetaminophen (Tylenol) handles pain but won’t address swelling. Take whichever you normally tolerate well, and follow the dosing on the package.
Chemical Burns Are Different
If the burn came from a chemical rather than heat, the approach changes. Flush the area with large amounts of water immediately and keep flushing for much longer than 20 minutes. The goal is to dilute and wash away the chemical completely.
One important exception: dry powder chemicals like lime should be brushed off the skin before you add water. Lime contains calcium oxide, which reacts with water to produce a strong alkali that causes even more damage. Brush off as much powder as possible first, then begin flushing. If you started rinsing before realizing this, stop, brush off the remaining particles, and resume.
How to Tell If You Need More Than First Aid
First-degree burns typically heal on their own in about a week. Shallow second-degree burns take two to three weeks. You can manage both at home as long as the burn is small and in a non-sensitive location.
A burn needs professional medical attention if it covers a large area (anything bigger than your palm is a reasonable threshold), if it’s on the face, hands, feet, groin, or over a joint, or if the skin looks white, brown, or leathery rather than red. White or leathery skin signals a third-degree burn, which has destroyed the full thickness of skin and requires hospital care.
Burns are also classified as dirty wounds for tetanus purposes. If your last tetanus shot was five or more years ago, or if you’re unsure of your vaccination history, you’ll likely need a booster. This is especially true for deeper burns or any burn contaminated with debris.