Cool water, moisturizer, and time are the three essentials that help a sunburn heal. Most mild sunburns resolve within a few days to a week, but what you do in the first 24 hours can significantly reduce pain, prevent complications, and speed recovery. Here’s what actually works.
Cool Your Skin Right Away
The single most effective first step is bringing down the temperature of your skin. Run a clean towel under cool tap water and drape it over the burned area, or take a cool bath. Aim for about 10 minutes at a time, and repeat several times throughout the day. Adding a couple ounces of baking soda to a full bathtub can help soothe irritation further.
Avoid ice or ice packs directly on the burn. Your skin is already damaged, and extreme cold can injure it further. Cool, not cold, is the goal. Skip hot showers entirely until the burn has calmed down, since heat pulls moisture out of already-compromised skin and intensifies pain.
Take a Pain Reliever Early
Sunburn pain typically starts within a few hours and peaks around 24 hours after exposure. Taking an anti-inflammatory pain reliever like ibuprofen or naproxen early, before the pain peaks, helps reduce both swelling and discomfort. These work by dialing down the inflammatory response your body launches in reaction to UV damage. Over-the-counter doses are fine for most adults. If you can only take acetaminophen, it will help with pain but won’t address inflammation the same way.
Moisturize the Right Way
Once you’ve cooled the skin, the next priority is locking in moisture. Sunburned skin loses water rapidly, which is why it feels tight and dry. The best approach is layering: start with a product containing a humectant like hyaluronic acid or glycerin, which pulls moisture from the air into your skin’s surface. Then follow with an occlusive or emollient cream that seals that moisture in and acts as a physical barrier against further water loss.
Aloe vera gel is the classic choice for good reason. It contains over 75 active compounds, including minerals, amino acids, and vitamins. It reduces inflammation by suppressing the chemical signals that drive swelling and redness. A compound called glucomannan stimulates the skin cells responsible for collagen production, which directly supports healing. Aloe also contains magnesium lactate, which blocks histamine production, the chemical that causes itching and irritation. For best results, use pure aloe vera gel (refrigerating it first adds a cooling bonus) and apply it liberally several times a day.
One ingredient category to avoid: products containing benzocaine or other numbing agents ending in “-caine.” While they promise pain relief, the FDA has flagged benzocaine for its ability to cause a serious condition where the blood carries significantly less oxygen than normal. On damaged, sunburned skin that absorbs products more readily, this risk increases. Stick with aloe and simple, fragrance-free moisturizers instead.
Drink More Water Than Usual
Sunburn isn’t just a surface problem. Your body sends extra blood flow to the damaged area as part of the healing response, and fluid shifts toward the skin. This can leave you mildly dehydrated even if you don’t feel thirsty. Increase your fluid intake for several days after a burn. Watch for signs of dehydration like fatigue, dry mouth, and darker or less frequent urine. Water is sufficient for most people, though drinks with electrolytes help if the burn covers a large area or you were also heat-exposed.
Managing Itch and Peeling
A few days into healing, the itch arrives. This is your body shedding the damaged outer layer of skin, and it can be maddening. Colloidal oatmeal, finely ground oats you can add to a lukewarm bath or find in lotions, has direct anti-inflammatory and antioxidant properties. Studies show it reduces pro-inflammatory signals in the skin and significantly improves dryness, scaling, roughness, and itch intensity. An over-the-counter oral antihistamine like diphenhydramine can also take the edge off, especially at night when itching tends to feel worse.
When peeling starts, resist the urge to pull or pick at it. Keep applying moisturizer to peeling areas. The new skin underneath is fresh and sensitive, and tearing off strips of peeling skin can expose it prematurely or cause small wounds. If a blister forms, leave it intact. An unbroken blister acts as a natural bandage, protecting the healing skin beneath. If one breaks on its own, gently clean it with mild soap and water, apply antibiotic ointment, and cover it with a non-stick bandage.
What the Healing Timeline Looks Like
A first-degree sunburn, the kind with redness and tenderness but no blisters, typically heals in a few days to one week. You’ll notice the redness deepen over the first day, then gradually fade as peeling begins. Your skin should return to its normal shade within about a week.
A second-degree sunburn goes deeper into the skin and produces blisters. These can take several weeks to fully heal and sometimes need medical attention. Pain, swelling, and peeling are all more intense and longer-lasting with this type of burn.
Signs That Need Medical Attention
Most sunburns are uncomfortable but manageable at home. However, some burns cross into territory that doctors call sun poisoning. Get medical help if your sunburn comes with blistering alongside any of these symptoms: bright red or oozing skin, severe pain that isn’t controlled by over-the-counter medication, fever, shivering or feeling extremely cold, headache, or nausea and vomiting. These signs suggest your body is mounting a systemic response to the damage, not just a local skin reaction, and you may need professional treatment to recover safely.