You can’t reverse a sunburn once it happens, but you can significantly reduce the pain, swelling, and skin damage with the right steps in the first 24 hours. Sunburn pain typically starts within a few hours of UV exposure and peaks at about 24 hours, so acting quickly makes a real difference in how uncomfortable the next few days will be.
Cool Your Skin Down First
The moment you notice a burn developing, get indoors and out of the sun. Your skin’s blood vessels have dilated, flooding the area with blood and immune cells to repair UV damage. That process causes the redness, heat, and swelling you’re feeling, and continued sun exposure only deepens the injury.
Take a cool (not cold) bath or shower. Cool water pulls heat out of the skin and offers immediate pain relief. When you get out, gently pat yourself dry rather than rubbing. Your skin is inflamed and fragile, and friction will make things worse. If a full shower isn’t practical, drape a cool, damp washcloth over the burned areas for 10 to 15 minutes at a time.
Moisturize While Skin Is Still Damp
This step is easy to skip, but it’s one of the most effective things you can do. Apply a moisturizer containing aloe vera or soy right after patting dry, while your skin still has some moisture on it. This locks in hydration and helps calm inflammation. Aloe vera is rich in water, contains vitamins C and E that reduce skin stress, and has anti-inflammatory properties that ease redness and swelling. It also helps limit how much your skin peels later on. Calamine lotion is another good option, especially if the burn is itchy.
For extra relief, refrigerate your aloe gel or moisturizer before applying it. The cold adds a second layer of comfort on top of the soothing ingredients.
One important rule: avoid products containing alcohol. They dry out already damaged skin and increase irritation. Also avoid petroleum jelly and oil-based ointments on a fresh burn. These clog pores and trap heat and sweat against the skin, which is the opposite of what you want when your body is trying to cool an inflamed area.
Take an Anti-Inflammatory Early
Over-the-counter ibuprofen or aspirin can reduce both the swelling and the pain of a sunburn. These work by dampening your body’s inflammatory response, not just masking pain the way acetaminophen does. The key is timing. Research published in the dermatology journal Cutis found that anti-inflammatory medications are most effective when taken soon after UV exposure, with the greatest reduction in redness seen around six hours after the burn, well before inflammation hits its peak.
In practical terms, take ibuprofen as soon as you realize you’re burned, and continue taking it at the recommended dose on the label for the first day or two. Starting early gives the medication time to reach effective levels in your bloodstream before the worst of the inflammation sets in.
Drink More Water Than Usual
A sunburn draws fluid toward the surface of your skin as part of the inflammatory response. That fluid has to come from somewhere, and a significant burn can leave you mildly dehydrated without you realizing it. You may notice increased thirst, a headache, or fatigue. Drink extra water over the next few days, and if you’re also dealing with heat exposure from the same day, add an electrolyte drink or two.
Leave Blisters Alone
If your burn has blisters, you have a second-degree sunburn. The fluid inside those blisters is protecting the raw skin underneath while it heals. Popping them removes that barrier and opens the door to infection. Keep blisters clean, and if one breaks on its own, gently clean the area and apply petroleum jelly to protect the exposed skin. (Petroleum jelly is fine for open blisters as a wound protectant; it’s only counterproductive on intact, hot sunburned skin.)
Managing the Peeling Phase
Within a few days, your skin will likely start to peel. This is your body shedding the top layer of cells that were too damaged to repair. Some cells recover, some die off, and your body clears the dead ones by letting them flake away. It looks unpleasant but it’s a normal part of healing.
Resist the urge to pull or scrub peeling skin. Forcing it off can tear healthy skin underneath and increase your risk of scarring or infection. Instead, keep applying moisturizer consistently throughout the peeling stage. This softens the dead skin so it comes off naturally and keeps the new skin beneath it hydrated and protected. A fragrance-free, water-based lotion works well here.
What Not to Do
- Don’t use ice directly on the burn. Ice can damage already-injured skin. Stick with cool water and cool compresses.
- Don’t wear tight clothing over burned areas. Friction and pressure increase pain and can worsen blistering.
- Don’t go back in the sun. Your skin is vulnerable for days after a burn. If you have to be outside, cover the area with loose clothing rather than applying sunscreen over raw skin.
- Don’t use “-caine” products like benzocaine sprays. These topical anesthetics can irritate burned skin further and occasionally cause allergic reactions.
When a Sunburn Needs Medical Attention
Most sunburns heal on their own within a week. But some burns cross into territory that requires professional care. If you develop a fever, chills, nausea, or feel confused after a severe burn, your body may be reacting to widespread skin damage in a way that goes beyond normal inflammation. Extensive blistering covering a large portion of your body, severe pain that doesn’t respond to over-the-counter medication, or signs of infection in a broken blister (increasing redness, warmth, pus, or red streaks spreading outward) all warrant a call to your doctor or a trip to urgent care.