Run cool water over the burn for 20 minutes. That single step, done within the first three hours after injury, is the most effective thing you can do to limit damage and reduce pain. The water should be around 15°C (59°F), which feels cool but not cold. While you’re cooling the burn, you can start figuring out how serious it is and what to do next.
How to Tell How Serious Your Burn Is
Burns fall into three categories based on how deep the damage goes, and the depth changes everything about how you treat them.
A first-degree burn only affects the outermost layer of skin. It looks pink or red, feels moderately painful, and stays dry with no blisters. A sunburn is the classic example. These heal on their own within a few days.
A second-degree burn reaches deeper into the skin and almost always produces blisters. If the skin underneath a broken blister is evenly pink or red, the burn is on the shallower end of second-degree. If the skin underneath looks mottled or patchy in color, the burn goes deeper. Shallow second-degree burns hurt significantly. Deeper ones can actually hurt less because more nerve endings are damaged.
A third-degree burn destroys the full thickness of the skin and extends into the tissue below. The burned area looks leathery, stiff, and dry. It may appear white, brown, or charred. These burns are painless at the center because the nerves are destroyed, though the edges where the burn transitions to healthy skin can still be extremely painful.
When You Need Emergency Care
Not every burn can be managed at home. Go to the emergency room if the burn covers an area larger than about 3 inches across, or if it involves the face, hands, feet, genitals, or any major joint like the elbow or knee. All third-degree burns need professional treatment regardless of size. The same is true for any second- or third-degree burn on a child under 10 or an adult over 50, since skin at those ages is thinner and heals more slowly.
Burns that wrap all the way around an arm, leg, or finger also need immediate care because swelling can cut off circulation.
Step-by-Step First Aid for Minor Burns
After cooling the burn with running water for a full 20 minutes, gently pat the area dry with a clean cloth. Do not pop any blisters. Intact blisters act as a natural sterile bandage over the damaged skin, and breaking them opens the door to infection.
First-degree burns usually don’t need a bandage at all. Applying a plain moisturizer is enough to keep the skin comfortable as it heals. For second-degree burns with blistering, cover the area loosely with a non-stick bandage to protect it. Change the dressing daily or whenever it gets wet or dirty.
Skip antibiotic creams unless a doctor tells you otherwise. Silver sulfadiazine, the silver-colored cream long considered a standard burn treatment, has been shown to slow healing and increase pain in minor burns. Topical antibacterial products in general can be toxic to the new skin cells trying to regenerate, and they’re not necessary unless the wound is actually infected.
What Not to Put on a Burn
Butter, coconut oil, and other greasy substances are among the most common home remedies for burns, and they make things worse. Grease traps heat in the skin, which means the burning process continues longer and causes more damage than it would have otherwise.
Ice and ice water are also harmful. While it seems logical that colder would be better, temperatures that extreme can damage already-injured skin and restrict blood flow to the area right when it needs circulation most. Stick with cool running water, not cold or icy.
Toothpaste, egg whites, and other internet remedies have no evidence behind them and carry a real risk of infection.
Managing Pain at Home
Over-the-counter anti-inflammatory medications like ibuprofen or naproxen work well for minor burns. They reduce both pain and swelling. Acetaminophen is another option if you can’t take anti-inflammatories. These medications have a ceiling effect, meaning there’s a maximum level of relief they can provide, so they’re appropriate for first-degree and small second-degree burns but won’t be enough for anything more severe.
Keeping the burn moisturized and covered also reduces pain by preventing air from hitting exposed nerve endings.
Chemical and Electrical Burns
Chemical burns have one critical difference from heat burns: you need to flush the area with large amounts of running water for at least 20 minutes, and you should remove any clothing or jewelry that contacted the chemical while you’re rinsing. Don’t try to neutralize the chemical with another substance. Just use water.
Electrical burns are deceptive. The mark on the skin may look small, but electricity travels through the body and can damage muscles, blood vessels, nerves, and organs along its path. Anyone who has been shocked by household current or higher should be evaluated by a doctor even if the visible burn looks minor. Call 911 if the source was a high-voltage wire or lightning, or if the person has confusion, difficulty breathing, or an irregular heartbeat.
Signs of Infection
Burns are especially vulnerable to infection because the skin’s barrier is broken. Watch the burn daily for warning signs. Increasing redness that spreads beyond the edges of the original burn into surrounding healthy skin is one of the earliest indicators. Pain that gets worse after the first day or two instead of improving is another red flag.
Other signs include swelling or warmth around the wound, pus or cloudy drainage, fever, and red streaks extending outward from the burn along the skin. If any of these develop, the burn needs medical attention. Infected burns can progress quickly from a local skin problem to a systemic illness.
Tetanus and Burns
Burns are classified as “dirty” wounds for tetanus purposes, which means the threshold for needing a booster is lower than for a clean cut. If you’ve completed your full tetanus vaccine series and your last booster was less than five years ago, you’re covered. If your last shot was five or more years ago, or if you’re unsure of your vaccination history, you should get a booster. People who have never been fully vaccinated against tetanus may also need an injection of tetanus immune globulin for immediate protection.
Reducing Long-Term Scarring
Any burn that goes deeper than first-degree has the potential to scar. The single most studied and effective tool for minimizing raised, thickened scars is silicone. Silicone sheets or gel applied to the healed burn are considered the first-line treatment for abnormal scarring, and the evidence behind them spans over 40 years of research. Sheets work well on flat areas of the body but can shift around on joints or areas that sweat heavily. Silicone gel, applied like a lotion, is a practical alternative for the face, hands, and other spots where a sheet won’t stay put.
Healed burn skin is also far more vulnerable to sun damage than normal skin. New skin lacks the pigment and thickness that provide natural UV protection, so even brief sun exposure can cause permanent darkening or discoloration. Keep healed burns covered or protected with broad-spectrum sunscreen for at least a year, and ideally longer.