Cool the burn under running water for at least 20 minutes. That single step, done as soon as possible, is the most important thing you can do after a burn. It stops the burning process in deeper tissue, reduces pain, and lowers the risk of scarring. Everything else, from pain relief to wound care, builds on getting that initial cooling right.
Cool the Burn Immediately
Run cool (not cold) tap water directly over the burned area for a full 20 minutes. This feels like a long time, and most people stop too early. Use a timer. The water doesn’t need to be icy. Regular cool tap water works best because it draws heat out of the tissue gradually without shocking the skin or restricting blood flow.
If you can’t get to running water, a cool, wet cloth placed on the burn and re-soaked frequently is a backup option, but running water is significantly more effective because it continuously carries heat away. While you’re cooling the burn, remove any clothing, rings, watches, or jewelry near the area before swelling starts. If fabric is stuck to the skin, don’t pull it off. Leave it for medical professionals.
What Not to Put on a Burn
Resist the urge to apply anything from your kitchen. Butter, oil, toothpaste, egg whites, honey, yogurt, milk, and tomato paste are all commonly used home remedies that cause real harm. These substances are not sterile and can contaminate an open wound. Some form a crust over the burn that traps heat and makes wound cleaning more painful later. Toothpaste in particular can cause skin irritation and permanent discoloration. In young children with food allergies, applying milk or egg whites to a burn can trigger serious allergic reactions.
Ice and ice water are also counterproductive. They cause blood vessels to constrict, which reduces blood flow to the injured tissue and can actually make the burn deeper and more severe. Stick with cool running water only.
How to Tell How Serious Your Burn Is
Burns fall into three categories based on depth, and knowing which one you’re dealing with helps you decide what to do next.
Superficial burns damage only the outermost layer of skin. They turn red, feel painful, and heal on their own within a few days. A mild sunburn or a quick touch to a hot pan falls here.
Partial-thickness burns go deeper into the second layer of skin. They blister, may change color or texture beyond simple redness, and are often very painful. These are the burns that need careful wound care and sometimes medical attention depending on their size and location.
Full-thickness burns destroy all layers of skin and can reach the fat underneath. Because they destroy nerve endings, they may not hurt at all, which can be misleading. The skin may look white, brown, or charred. These always require emergency medical care.
When a Burn Needs Emergency Care
Location matters as much as size. Any partial-thickness or full-thickness burn on the face, hands, feet, genitals, or over a major joint needs professional treatment, regardless of how small it is. These areas involve critical function, and improper healing can cause lasting problems.
Size also matters. Doctors estimate burn size as a percentage of total body surface area. For reference, one arm (including the hand) represents about 9% of the body, and the entire front of the torso is about 18%. Burns covering more than 10% of the body in children under 10 or adults over 50 require specialized burn unit care. For other age groups, that threshold is 20%. Any full-thickness burn larger than about 5% of the body needs a burn unit at any age.
All electrical burns, chemical burns, and burns involving smoke inhalation require emergency evaluation, even if the visible skin damage looks minor. The internal damage from these injuries is often far worse than what you can see on the surface.
Caring for Blisters
Burn blisters form when fluid collects between damaged skin layers. Don’t pop them. The intact blister acts as a natural sterile bandage, protecting the raw skin underneath from bacteria and debris. The American Academy of Dermatology specifically advises against popping burn blisters.
If a blister breaks on its own, don’t peel away the dead skin. Leave that layer in place as a protective covering. Let the fluid drain naturally, then cover the area with a clean, dry, sterile bandage. Change the bandage daily or whenever it gets wet or dirty, and watch for signs of infection.
Managing Pain After a Burn
Over-the-counter pain relievers like ibuprofen and acetaminophen are effective for burn pain. Ibuprofen has the added benefit of reducing inflammation, which can help with swelling around the burn site. For ongoing pain from a healing burn, these medications can be used over several days, though prolonged use of anti-inflammatory medications like ibuprofen or naproxen should be discussed with a healthcare provider because of potential side effects on the stomach and kidneys.
Keeping the burn covered with a loose bandage also reduces pain by protecting exposed nerve endings from air and contact with clothing.
Spotting an Infection Early
Burns are especially vulnerable to infection because the skin’s protective barrier is compromised. Watch the wound closely over the first one to two weeks. Signs of infection include increasing redness, warmth, or swelling around the burn, along with worsening pain rather than gradual improvement.
The most telling sign is drainage. A healing burn may weep clear fluid, which is normal. But thick, milky, or discolored fluid (white, yellow, green, or brown) that smells bad is pus, and it means the wound is infected. If the color or smell of drainage changes, the infection is likely worsening. Fever, chills, or red streaks spreading outward from the burn are signs the infection may be moving beyond the wound itself.
Tetanus and Burns
Burns are classified as dirty wounds for tetanus purposes because they contain damaged tissue. If your last tetanus shot was more than five years ago, you likely need a booster after a burn. If you’ve never completed the full primary tetanus vaccine series, the need is even more urgent. This is something to address at your first medical visit after the injury.
Protecting Healing Skin From the Sun
New skin that forms over a healed burn is highly sensitive to ultraviolet light. Sun exposure on healing burn skin causes pigment changes that can become permanent, leaving the area noticeably lighter or darker than surrounding skin. Keep healed burn areas protected from direct sunlight for at least one full year after the injury. This means covering the area with clothing or using a broad-spectrum sunscreen with a high SPF whenever you’re outdoors, even on cloudy days. This is one of the simplest things you can do to minimize long-term scarring and discoloration.