Cool, running water is the single most important thing to put on a first-degree burn, and you should keep it there for a full 20 minutes. After cooling, a thin layer of aloe vera gel or a fragrance-free moisturizer helps soothe the skin and support healing. Most first-degree burns affect only the outer layer of skin, causing redness and pain but no blisters, and they heal on their own within a week or two.
Cool Water First, for Longer Than You Think
The instinct to run a burn under water is correct, but most people pull away far too soon. Hold the burned area under cool, running water for at least 20 minutes. Not cold water, not ice water. Cool. This reduces heat trapped in the skin, limits the depth of tissue damage, and brings significant pain relief.
Start as soon as possible after the injury. The sooner you begin cooling, the less damage spreads into deeper layers of skin. If you can’t get to a faucet, a cool wet cloth can work temporarily, but running water is more effective because it continuously carries heat away. Remove any rings, watches, or tight clothing near the burn before swelling starts.
What to Apply After Cooling
Once you’ve cooled the burn thoroughly, gently pat the area dry and apply one of the following:
- Aloe vera gel: Pure aloe vera has natural anti-inflammatory properties and helps keep the skin moisturized as it heals. Use a product that’s 100% aloe or as close to it as possible, not a bright green after-sun lotion loaded with fragrances and alcohol.
- Fragrance-free moisturizer: A plain, gentle moisturizer prevents the skin from drying out and cracking, which can increase discomfort and slow healing.
- Petroleum jelly: A thin layer of petroleum jelly keeps the burn moist and acts as a mild barrier. It’s widely recommended by burn care centers for minor burns.
- Over-the-counter pain relief: Ibuprofen or acetaminophen can help with pain and inflammation from the inside, complementing whatever you apply topically.
Reapply your chosen moisturizer or aloe vera two to three times a day, or whenever the skin feels tight and dry. If the burn is in a spot that rubs against clothing or is likely to get dirty, cover it with a non-stick (non-adherent) bandage and a layer of sterile gauze over the top. Don’t place regular gauze or adhesive bandages directly on the burn, as they’ll stick to the damaged skin and cause pain when removed. Change the dressing daily.
What Not to Put on a Burn
Several popular home remedies actually make burns worse. Avoid all of these:
- Ice or ice water: Extreme cold can cause further tissue damage on top of the burn injury. Cool water is enough.
- Butter, oil, or eggs: Greasy substances trap heat in the skin and create a breeding ground for bacteria. They do nothing to promote healing.
- Toothpaste: This is a surprisingly persistent myth. Toothpaste contains ingredients like sodium lauryl sulfate (a detergent that irritates wounds), sorbitol (a sugar-like compound that encourages bacterial growth), and mint flavoring that intensifies the burning sensation. It’s also not sterile.
- Flour: Another folk remedy with no benefit. It introduces contaminants to broken skin.
If you’ve already applied one of these before reading this, gently rinse it off with cool water and switch to an appropriate treatment.
What Healing Looks Like
A first-degree burn typically stays red and tender for a few days. Over the following week, pain gradually fades and the damaged outer layer of skin begins to peel, similar to a sunburn. New skin underneath may look slightly lighter or pinker than the surrounding area for a short time. The entire process usually resolves within 7 to 14 days without scarring.
During healing, resist the urge to peel flaking skin. Let it shed on its own. Keep the area moisturized and protect it from sun exposure, since newly healed skin burns much more easily.
When a Burn Needs Medical Attention
Most first-degree burns heal fine at home, but some burns that look minor at first turn out to be deeper. If blisters develop within a few hours, the injury has reached the second layer of skin and may need professional care. Burns on the face, hands, feet, genitals, or over joints also warrant a medical visit regardless of size, because swelling and scarring in those areas can affect function.
Young children under 10 and adults over 50 have thinner skin and are more vulnerable to complications, so a lower threshold for seeking care makes sense in those age groups. The same applies to anyone with diabetes or immune conditions that slow wound healing. Signs of infection at any point, including increasing redness, swelling, warmth, pus, or fever, mean it’s time for professional evaluation.