First-degree burns affect only the outermost layer of skin and typically heal within 7 to 14 days without scarring. Treatment is straightforward: cool the burn, manage pain, keep the area moisturized, and protect it while your skin repairs itself. Here’s exactly how to handle each step.
What a First-Degree Burn Looks and Feels Like
A first-degree burn damages only the epidermis, the thin outer layer of your skin. The burned area will be red, dry, and painful to touch, but you won’t see blisters. That’s the key distinction from a second-degree burn, which penetrates deeper and produces fluid-filled blisters. Common causes include brief contact with a hot pan, a mild sunburn, or a splash of hot water that didn’t linger on the skin.
Cool the Burn Immediately
Run cool tap water over the burn for 20 minutes. Research on burn healing shows that water around 15°C (roughly 59°F, or what comes out of a cold tap) applied for 20 minutes produces the best outcomes for wound healing. You don’t need to measure the temperature precisely. Just use water that feels cool but not painfully cold.
Start as soon as possible after the injury. The sooner you begin cooling, the more effectively you limit heat from continuing to damage deeper tissue. If you can’t get to a faucet, a cool, wet cloth placed on the burn and refreshed frequently works as a backup, though running water is more effective.
What Not to Put on a Burn
Skip the butter, cooking oil, toothpaste, and egg whites. Greasy substances trap heat against the skin, which slows the release of warmth and actually causes more damage to already-injured tissue. Ice and ice water are also off the table. They’re too harsh and can further aggravate damaged skin, potentially causing frostbite on tissue that’s already compromised. Stick with cool (not cold) running water.
Cortisone cream, lotions, and oils should also be avoided. These can irritate the burn or interfere with healing. The list of safe topical options is short, and it’s covered below.
Managing Pain
Over-the-counter pain relievers work well for first-degree burn pain. Ibuprofen at 400 mg every 8 hours reduces both pain and inflammation. Acetaminophen at 1,000 mg every 6 hours is another option, especially if you can’t take ibuprofen. Don’t exceed 4,000 mg of acetaminophen in a 24-hour period. You can alternate the two medications since they work through different mechanisms.
The pain is usually worst in the first day or two, then gradually fades. Cool compresses can provide additional relief between doses of medication if the burn is still stinging.
Aftercare: Keeping the Burn Moisturized
Once the burn has cooled, apply a thin layer of petroleum jelly or aloe vera to the area. Either one helps keep the skin hydrated and protects the damaged surface while new cells grow in. You don’t need antibiotic ointment for a first-degree burn since the skin isn’t broken in a way that exposes you to significant infection risk.
Reapply the ointment as needed, particularly if the area feels tight or dry. If the burn is in a spot that rubs against clothing or is easily bumped, a loose, non-stick bandage can protect it. Change the bandage daily or whenever it gets wet or dirty. Burns on areas that stay exposed to air, like the face or forearms, generally do fine without a bandage as long as you keep them moisturized.
What to Expect as It Heals
Most first-degree burns heal completely within 7 to 14 days. During that window, the redness will gradually fade, and you’ll likely notice the outer layer of skin peeling or flaking off. This is normal and means new skin is forming underneath. Don’t pick at peeling skin, as pulling it off prematurely can expose tender tissue beneath.
Once healed, first-degree burns typically leave no scar. Some people notice temporary changes in skin color at the burn site, particularly after sunburns, but this usually resolves within a few weeks. Protecting the area from sun exposure while it’s healing and for several weeks afterward helps prevent lingering discoloration.
Signs of Infection
Infection in a first-degree burn is uncommon since the skin barrier isn’t fully broken. But it’s worth watching for a few warning signs: oozing or discharge from the burn, red streaks extending outward from the wound, increasing pain after the first couple of days instead of improving, or fever. A burn that hasn’t healed within two weeks also warrants medical attention, as it may be deeper than initially thought.
People with diabetes should be more cautious with any burn, even a superficial one, since impaired circulation and immune function can slow healing and increase infection risk.
Burns That Need More Than Home Treatment
First-degree burns are almost always safe to treat at home. However, the line between a first-degree and second-degree burn isn’t always obvious in the first few hours. If blisters develop, the injury is deeper than the epidermis and may need professional care.
Any burn larger than about 2 inches across that doesn’t improve within two weeks should be evaluated. Burns on the face, hands, feet, genitals, or over major joints like the knee or elbow deserve extra caution regardless of depth, because scarring or tightening in these areas can affect function. Very young children and adults over 50 are also more vulnerable to complications from burns, so a lower threshold for seeking care makes sense in those age groups.