Run the burn under cool (not cold) water for at least 20 minutes, then keep it clean, moisturized, and loosely covered while it heals. Most small burns, meaning first-degree burns or second-degree burns smaller than about 3 inches across, heal well with home care alone. Here’s exactly what to do at each stage.
Cool It Immediately
The single most important thing you can do for a fresh burn is get it under cool, running water as soon as possible and keep it there for a full 20 minutes. This isn’t optional, and 20 minutes is longer than most people think. Set a timer. The water should feel comfortable, not icy. Cold water or ice actually makes things worse by constricting blood vessels around the injury, which can deepen the damage.
Don’t put ice, butter, toothpaste, or cooking oil on the burn. Ice causes the same vasoconstriction problem as cold water. Butter and oil are not sterile and can trap bacteria in the wound. Toothpaste traps heat against the skin, slows healing, and can cause permanent discoloration.
Figure Out What You’re Dealing With
A first-degree burn only damages the outer layer of skin. It looks dry and red, like a sunburn, and it hurts. These heal in 3 to 5 days with no scarring.
A second-degree burn goes deeper. The skin looks wet and red, it blisters, and the pain is more intense. A shallow second-degree burn typically heals in about two weeks. Deeper ones take longer and may scar.
If the burn is larger than 3 inches, covers the face, hands, feet, groin, or a major joint, or looks white, leathery, or charred, it’s beyond home treatment. The same goes for any burn that wraps all the way around a finger or limb.
Apply Ointment the Right Way
Once the burn is cooled and gently patted dry, apply a thin layer of plain petroleum jelly. Skip the antibiotic ointments like those containing neomycin or bacitracin. Studies show they offer no healing advantage over plain petroleum jelly, and they commonly cause contact dermatitis, which adds redness and irritation that can look like infection and slow recovery. Plain petroleum jelly actually produced less wound redness and swelling in comparisons with antibiotic alternatives.
Spread the ointment onto the dressing, not directly onto the burn. Use a clean knife or tongue depressor rather than your fingers to keep the ointment jar sterile.
Bandage and Change Daily
Proper bandaging protects the burn from friction and bacteria while letting it heal. Layer it like this:
- First layer: A non-stick (non-adherent) dressing placed directly over the burn. Touch only the edges when positioning it.
- Second layer: Dry sterile gauze over the non-stick dressing. Never put dry gauze directly against an unhealed burn, because it will stick painfully.
- Third layer: A rolled gauze wrap to hold everything in place. If the burn is on an arm or leg, start wrapping from the point farthest from your body and work inward. Secure with tape, but don’t wrap tightly enough to restrict circulation.
Change the entire dressing once a day. Wash your hands before you start, gently clean the burn with mild soap and water, reapply petroleum jelly on a fresh non-stick pad, and re-wrap.
Managing Pain
Burns hurt most in the first 24 to 48 hours. Over-the-counter pain relievers like ibuprofen help with both pain and inflammation. The cooling water in the first step also provides significant pain relief, which is another reason to stick with the full 20 minutes.
If the burn blisters, resist the urge to pop them. Intact blisters act as a natural sterile bandage. If a blister breaks on its own, gently clean the area, apply petroleum jelly, and cover it with a fresh non-stick dressing.
Watch for Infection
A healing burn naturally looks pink and may feel tender for days. That’s normal. What’s not normal is oozing pus, red streaks spreading outward from the burn, increasing pain after the first couple of days, or a fever. Any of these signs point to infection that needs medical attention.
Keep the burn clean with daily dressing changes and avoid touching it with unwashed hands. These two habits prevent the vast majority of infections in minor burns.
Tetanus and Small Burns
Burns are classified as “dirty” wounds for tetanus purposes because damaged tissue can harbor the bacteria that cause tetanus. If you’ve completed your primary tetanus vaccine series and your last booster was within the past five years, you don’t need another one. If your last shot was more than five years ago, a booster is recommended. If you’ve never been vaccinated, have an incomplete series, or aren’t sure of your history, getting vaccinated is especially important.
Protect Healing Skin From the Sun
New skin forming over a burn is significantly more vulnerable to sun damage than normal skin, and this sensitivity lasts for months, sometimes over a year. Sun exposure during this period can cause permanent darkening or discoloration of the healed area. Use a broad-spectrum sunscreen with SPF 30 or higher on the area whenever it will be exposed, or keep it covered with clothing. Start this as soon as the skin has closed and continue for at least a year.
What the Healing Process Looks Like
A first-degree burn typically resolves in 3 to 5 days. The redness fades, the tenderness disappears, and the outer layer of skin may peel, similar to a sunburn. No scarring is expected.
A shallow second-degree burn takes roughly two weeks. You’ll see the blistered or raw area gradually develop new pink skin underneath. Deeper second-degree burns can take three weeks or longer, and these carry some risk of scarring. If a second-degree burn hasn’t shown clear signs of healing by the two-week mark, it’s worth getting a professional evaluation, as it may be deeper than it initially appeared.