A bad sunburn needs cooling, moisture, and time. Most mild to moderate sunburns heal in about seven days with proper care, but what you do in the first 24 hours can significantly affect how much pain you experience and how quickly your skin recovers. Here’s a step-by-step approach to managing it.
Cool the Skin Right Away
As soon as you notice the burn, apply a clean towel dampened with cool tap water to the affected area, or take a cool bath or shower. Aim for about 10 minutes of cooling, and repeat several times throughout the day. Cool water constricts blood vessels and pulls heat out of the skin, which slows the inflammatory cascade that’s ramping up beneath the surface.
Avoid ice or ice packs directly on sunburned skin. The skin is already damaged, and extreme cold can injure tissue further or cause frostbite on skin that can’t properly sense temperature changes. Room-temperature to slightly cool water is all you need.
Apply the Right Moisturizer
After cooling, apply a moisturizer while your skin is still slightly damp. This traps water in the skin and helps counteract the dryness and tightness that get worse over the next few days. The American Academy of Dermatology recommends moisturizers containing aloe vera or soy for sunburn relief.
If you’re reaching for aloe vera gel, look for 100% aloe vera with no added fragrances, dyes, or alcohol. These additives can sting or further dry out damaged skin. Aloe-based lotions marketed for daily moisturizing often contain ingredients that aren’t ideal for a fresh burn, so check the label. Calamine lotion is another option that can ease the itching and irritation as your burn progresses.
A colloidal oatmeal bath, available as packets at most drugstores, can also soothe widespread burns. The finely ground oatmeal forms a protective film on the skin and reduces itching.
Manage Pain and Swelling
Sunburn pain comes from prostaglandins, hormone-like substances your body produces in response to UV damage. These chemicals make nerve cells more responsive to pain signals and widen blood vessels, which is why sunburned skin turns red, swells, and throbs. Over-the-counter anti-inflammatory pain relievers like ibuprofen or aspirin work by blocking the enzymes that produce prostaglandins, reducing both the pain and the swelling.
Take them as soon as you notice the burn developing. Sunburn inflammation builds over 12 to 24 hours, often peaking the day after exposure, so getting ahead of it matters. Continue as directed on the package for the first day or two.
Skip topical pain-relief sprays or creams containing benzocaine or lidocaine. These can irritate or cause allergic reactions on already-compromised skin.
Drink Extra Water
A sunburn draws fluid to the skin’s surface and away from the rest of your body. This makes dehydration a real risk, especially if the burn covers a large area. You’ll likely feel thirstier than usual. Follow that instinct and increase your water intake for the first two to three days. Signs of dehydration include dizziness, dry mouth, fatigue, and reduced urination.
Leave Blisters Alone
If your sunburn blisters, you have a second-degree burn. The fluid inside those blisters is part of your body’s healing process, and the intact skin covering them acts as a natural bandage against bacteria. Do not pop or peel them.
If a blister breaks on its own, trim the dead skin with clean, fine scissors wiped with rubbing alcohol. Apply an over-the-counter antibiotic ointment to the open area twice a day for about three days, washing gently with warm water before each application. This helps prevent a secondary bacterial infection, which is the main complication to watch for with blistering sunburns.
Signs of infection include pus draining from the blister, red streaks spreading outward from the burn, or pain that gets worse after the second day rather than improving.
What to Expect as It Heals
A first-degree sunburn (red, painful, no blisters) affects only the outermost layer of skin and typically heals within a few days. A second-degree sunburn with blistering reaches deeper and takes longer, with more significant pain.
Peeling usually starts around day three, regardless of severity. Your body is shedding cells with DNA damage that could eventually become cancerous. It’s a protective mechanism, not something to speed up. Don’t pick or pull at peeling skin. Let it come off naturally and keep the area moisturized. For mild to moderate burns, peeling stops once the burn has healed, typically around day seven.
During the entire healing period, keep the burned area completely out of the sun. Wear loose, soft clothing over it. Tight fabrics trap heat and create friction that worsens pain and can tear fragile healing skin.
When a Sunburn Needs Medical Attention
Most sunburns, even painful ones, heal on their own. But certain signs mean you need medical care right away:
- Blisters covering more than 20% of your body (roughly a whole leg, your entire back, or both arms)
- Fever above 102°F (39°C)
- Chills or extreme pain that over-the-counter medications don’t touch
- Signs of dehydration that don’t improve with increased fluids
- Signs of infection like pus, spreading redness, or worsening pain after day two
- Any sunburn on a baby under 1 year old
Severe sunburns with systemic symptoms like fever and chills can require professional wound care and IV fluids. Don’t wait these out at home.
Preventing the Next One
A single blistering sunburn during childhood or adolescence nearly doubles the risk of melanoma later in life, and the risk climbs with every subsequent burn. The most effective protection combines multiple layers: seeking shade during peak UV hours (roughly 10 a.m. to 4 p.m.), wearing sun-protective clothing including a wide-brimmed hat and UV-blocking sunglasses, and applying a broad-spectrum, water-resistant sunscreen with SPF 30 or higher. Reapply sunscreen every two hours, or immediately after swimming or sweating, even on cloudy days when up to 80% of UV radiation still reaches your skin.