For a minor burn, the most important step is cooling it under cool (not cold) running water for about 10 minutes. This single action reduces pain, limits tissue damage, and sets up faster healing. Everything else you do afterward matters less than getting water on the burn quickly.
How to Identify Burn Severity
Before you treat a burn, you need a rough sense of how serious it is. Burns fall into three categories based on how deep the damage goes.
A first-degree burn affects only the outermost layer of skin. It causes pain and redness or discoloration but no blistering. A sunburn is the most common example. These heal on their own within a week or so.
A second-degree burn goes deeper, reaching the second layer of skin. You’ll typically see swelling, and the skin may look red, white, or splotchy. Blisters often form. These burns are more painful and take longer to heal, but most small ones can still be managed at home.
A third-degree burn destroys all layers of skin and sometimes the fat and muscle underneath. The burned area may look black, brown, white, waxy, or leathery. Because nerve endings are destroyed, these burns may cause surprisingly little pain at the burn site itself. Third-degree burns always require emergency medical care.
Immediate First Aid for a Thermal Burn
As soon as you’re burned, get the affected area under cool running water. Not ice water, not cold water. Cool. Keep it there for about 10 minutes. If you can’t get to a faucet, a cool wet cloth pressed against the burn will work temporarily, but running water is better because it steadily draws heat out of the tissue.
While cooling, remove any rings, watches, bracelets, or tight clothing near the burn before swelling sets in. If clothing is stuck to the burn, don’t pull it off. Cut around it and leave what’s stuck in place.
After cooling, you can apply a thin layer of petroleum jelly or aloe vera to keep the area moist. You don’t need an antibiotic ointment for this. Some antibiotic ointments actually cause allergic reactions that make things worse. If the burn is in a spot that rubs against clothing or could get dirty, cover it loosely with a sterile non-stick gauze pad. Avoid any dressing that sheds fibers, since loose fibers can embed in the wound. Change the dressing once a day.
What Not to Put on a Burn
Butter, toothpaste, and ice are the three most common home remedies people reach for, and all three make burns worse.
Butter and other greasy substances (mayonnaise, cooking oil) trap heat in the wound, slowing healing. Bacteria in food-based remedies also raise the risk of infection. Toothpaste contains ingredients that irritate open or damaged skin, intensifying pain and increasing the chance of scarring. And ice, despite feeling like it should help, constricts blood flow to the damaged tissue. It can numb the area so thoroughly that you don’t realize you’re causing a secondary cold injury on top of the burn.
Also skip cream, lotion, cortisone, and egg white. The only things that belong on a minor burn are petroleum jelly, aloe vera, and a clean non-stick bandage.
Managing Pain After a Burn
Over-the-counter pain relievers are the standard approach for burn pain. Ibuprofen is often the first choice because it reduces both pain and inflammation. Acetaminophen works well for pain but won’t address swelling. You can take either one following the directions on the package.
For the first day or two, the burn will likely hurt most when air hits it. Keeping it covered with a thin layer of petroleum jelly under a non-stick bandage reduces that exposure and makes a noticeable difference in comfort. Cool (again, not cold) compresses can also help with pain flare-ups during the first 24 to 48 hours.
Chemical Burns Need a Different Approach
If the burn came from a chemical rather than heat, the protocol changes. For a dry chemical (like powdered lime or cement), first brush off as much of the substance as you can while wearing gloves. Don’t wet it first, since some dry chemicals react with water.
Once the dry material is removed, or if the chemical is already liquid, rinse the area with running water for at least 20 minutes. That’s twice as long as a thermal burn requires. Use a shower if one is available. Remove any clothing or jewelry that contacted the chemical while you’re rinsing, since these items can hold the substance against your skin and continue the burn.
All chemical burns warrant professional medical evaluation, even if they look minor on the surface. Chemical damage can continue progressing deeper into tissue after the initial exposure.
Burns That Need Emergency Care
Some burns require more than first aid. The American Burn Association’s referral criteria give a clear picture of when to get to an emergency room or burn center:
- Location matters. Any second- or third-degree burn on the face, hands, feet, genitals, or over a major joint needs professional treatment, regardless of size.
- Size matters. In adults between 10 and 50, second- or third-degree burns covering more than 20% of the body need a burn unit. For children under 10 or adults over 50, that threshold drops to 10%. Any third-degree burn larger than about the size of your palm (roughly 5% of body surface area) needs specialized care at any age.
- Type matters. Electrical burns (including lightning strikes), chemical burns, and burns involving smoke or hot air inhalation all require emergency evaluation.
- Context matters. If someone has a burn alongside another injury like a fracture or blast injury, or if they have preexisting conditions that complicate healing (diabetes, immune suppression), the bar for seeking emergency care is lower.
A quick way to estimate burn size: in adults, each arm represents about 9% of total body surface area. Each leg is about 18%. The torso front and back are each 18%. The head is about 9%. In children, the head is proportionally larger and the legs are smaller, so these percentages shift with age.
Caring for a Burn as It Heals
Minor burns typically heal within one to three weeks depending on depth. During that time, keep the burn clean and moisturized. Wash it gently with mild soap and water once a day, reapply petroleum jelly or aloe vera, and put on a fresh non-stick bandage.
Don’t pop blisters. They’re a natural protective barrier that shields the new skin forming underneath. If a blister breaks on its own, gently clean the area, apply petroleum jelly, and cover it. Watch for signs of infection: increasing redness spreading beyond the burn’s edges, worsening pain after the first couple of days, pus or cloudy fluid, fever, or red streaks moving away from the wound. These are signals that the burn needs medical attention.
Once healed, the new skin will be more sensitive to sun exposure for up to a year. Covering the area or using sunscreen helps prevent permanent discoloration or increased scarring.