Cool the burn under running tap water for at least 20 minutes. This is the single most important thing you can do after a burn, and it works even if you can’t start for up to 30 minutes after the injury. The water should be cool but not cold, ideally between 12–18°C (54–64°F), which is roughly the temperature of normal tap water. Everything else, from pain relief to covering the wound, comes after cooling.
How to Cool the Burn Properly
Hold the burned area under gently running tap water. Don’t use ice, ice water, or anything frozen. Research on burn wounds shows that ice-cold water (1–8°C) actually causes more tissue death than no cooling at all. The extreme cold constricts blood vessels around the injury, cutting off the blood supply the damaged tissue desperately needs. Tap water at a comfortable cool temperature reduces tissue damage, limits how deep the burn penetrates, and speeds healing.
If running water isn’t available, a clean cloth soaked in cool water and placed over the burn can help, though running water is more effective. Keep cooling for a full 20 minutes. It will feel like a long time, but shorter durations are significantly less effective. If the burned person starts shivering, especially a child, keep cooling the burn itself but cover the rest of the body with a blanket to maintain body temperature.
What Not to Put on a Burn
Skip every home remedy you’ve heard of. Butter, toothpaste, lemon juice, onion, hydrogen peroxide, and cooking oils all cause additional tissue damage. Some trap heat in the wound. Others introduce bacteria. All of them make it harder for medical professionals to assess and treat the burn later. The only thing that should touch a fresh burn in the first 20 minutes is clean, cool water.
After Cooling: Cover and Protect
Once you’ve cooled the burn for 20 minutes, gently pat the area dry and cover it loosely. Plastic kitchen wrap (cling film) works well as a temporary covering because it protects the wound from contamination without sticking to it. Lay it over the burn in flat layers rather than wrapping it around an arm or leg, which could restrict circulation if the area swells. Discard the first few inches from the roll before use, since the outer layer may not be clean.
If you don’t have plastic wrap, a clean, non-fluffy cloth or a sterile gauze pad will do. Avoid cotton wool or anything with loose fibers that could stick to the wound.
Managing Pain at Home
Burns hurt. For minor burns you’re treating at home, over-the-counter pain relievers help considerably. Acetaminophen (up to 1,000 mg every six hours, no more than 4,000 mg in 24 hours) and ibuprofen (400 mg every eight hours) can be taken together safely for most adults, since they work through different mechanisms. Ibuprofen also reduces inflammation around the burn, which helps with swelling.
Leave Small Blisters Alone
If blisters form, your instinct may be to pop them. Resist that urge for small blisters. The fluid inside acts as a natural sterile bandage, protecting the raw skin underneath from infection. The general guideline: blisters smaller than your little fingernail are best left intact. Larger blisters are more prone to tearing on their own and may benefit from careful drainage, but that’s better left to a healthcare provider who can do it in a clean environment and apply an appropriate dressing.
How to Tell If Your Burn Needs Medical Care
Not every burn requires a trip to the emergency room, but some absolutely do. Here’s how to gauge severity by what you see and feel:
- First-degree burns (superficial) are red, dry, and painful with no blisters. Think of a mild sunburn. These heal on their own within a week with basic wound care.
- Superficial second-degree burns blister and are very painful. The skin underneath a broken blister looks uniformly pink or red. Most small ones can be managed at home, though they take two to three weeks to heal.
- Deep second-degree burns also blister, but the skin beneath looks mottled or patchy and is less painful than you’d expect. Reduced pain in a burn is not a good sign. It means deeper layers of skin are damaged.
- Third-degree burns look leathery, stiff, or waxy. They can be white, brown, or charred. They don’t hurt at the center because the nerves are destroyed. These always need emergency care.
The American Burn Association recommends immediate medical evaluation for any burn that covers 10% or more of your body surface (roughly the area of one arm equals about 9%). Burns on the face, hands, feet, genitals, or over joints also need professional assessment regardless of size, because scarring in these areas can affect function. The same applies to burns that wrap all the way around a limb.
Chemical and Electrical Burns Are Different
If the burn came from a chemical, the first step depends on the chemical’s form. For dry or powdered chemicals, brush off as much as possible before using water. Then flush with running water for at least 20 minutes, just like a heat burn. Don’t try to neutralize the chemical with another substance. Water and removal of contaminated clothing are what matter.
Electrical burns are uniquely dangerous because the visible skin damage often doesn’t reflect what’s happening inside the body. Electricity travels through tissue, and it can damage the heart, muscles, and nervous system along the way. Someone with a small electrical burn on their hand may have serious internal injuries. Damaged muscle cells can leak their contents into the bloodstream, potentially harming the kidneys. Heart rhythm disturbances can occur hours after the injury. Every electrical burn, no matter how minor it looks on the surface, needs prompt medical evaluation.
Quick Reference: The First 30 Minutes
- 0–20 minutes: Cool under running tap water. Remove clothing and jewelry near the burn (unless stuck to the skin). Do not apply ice, butter, toothpaste, or any ointment.
- At 20 minutes: Pat dry gently. Cover loosely with plastic wrap in layers or a clean cloth.
- After covering: Take acetaminophen or ibuprofen for pain. Assess the burn’s severity using the guidelines above. Seek medical care for any burn larger than your palm, any burn on the face, hands, feet, or genitals, or any burn that looks deep or leathery.