Cool water is the fastest way to take the burn out of a sunburn. A cool compress held against the skin for about 10 minutes, repeated several times a day, draws heat from the inflamed tissue and provides immediate relief. But cooling alone won’t address the full cascade of inflammation happening beneath the surface, so a combination of approaches works best to manage pain, reduce swelling, and help your skin heal.
Why Sunburn Keeps Burning
Understanding what’s happening in your skin helps explain why sunburn hurts so much and why some remedies work better than others. When UV radiation damages your skin cells, those cells release a flood of inflammatory signals: prostaglandins, histamine, and other molecules that dilate blood vessels and draw fluid into the surrounding tissue. This extra fluid and swelling are what produce the redness, heat, and painful sensitivity you feel.
The burning sensation isn’t just surface-level. It’s a full inflammatory response, similar to what happens with any tissue injury. That’s why sunburn often feels worse 12 to 24 hours after sun exposure, even though you’ve been indoors for hours. The inflammatory process is still ramping up. Anything that interrupts that cycle of inflammation, heat, and fluid buildup will help reduce the pain.
Cool Compresses and Baths
The simplest and most effective first step is cooling the skin with tap water. Soak a clean towel in cool (not ice-cold) water and hold it against the burned area for about 10 minutes. Repeat this several times throughout the day. You can also take a cool bath with about 2 ounces (roughly a quarter cup) of baking soda dissolved in the tub, which helps soothe irritation and reduce itching.
Avoid ice or ice packs directly on the skin. Sunburned skin is already damaged, and extreme cold can injure it further. Cool tap water is enough to constrict blood vessels, slow the inflammatory response, and bring the surface temperature down.
Aloe Vera and Colloidal Oatmeal
Aloe vera gel is one of the most widely recommended topical treatments for sunburn, and for good reason. It has anti-inflammatory properties that reduce redness and swelling, plus antioxidants like vitamins C and E that help counter the oxidative stress UV damage causes in skin cells. For an extra layer of relief, store your aloe vera gel in the refrigerator. The chilled gel feels noticeably more soothing on hot, inflamed skin.
Colloidal oatmeal is another strong option, especially once itching sets in. It contains natural compounds called avenanthramides, which are polyphenols that actively suppress inflammation at the cellular level. You can find colloidal oatmeal in bath soaks and lotions designed for sensitive or irritated skin. Adding it to a cool bath creates a combination that addresses both the heat and the itch simultaneously.
Over-the-Counter Pain Relief
Anti-inflammatory pain relievers like ibuprofen tackle sunburn from the inside. Because prostaglandins are a major driver of sunburn pain and swelling, blocking their production can meaningfully reduce discomfort. Taking ibuprofen early, ideally within the first few hours of noticing a burn, may limit the intensity of the inflammatory response before it peaks.
A 1% hydrocortisone cream, available without a prescription, can also help with localized areas of intense inflammation. It works by calming the immune response in the skin. Apply a thin layer to the most painful spots, but skip it on any areas that are blistered or have broken skin.
Drink More Water Than You Think
Sunburn pulls fluid from the rest of your body toward the skin’s surface. Your blood vessels leak fluid into the spaces between skin cells, which is what causes the swelling and tightness you feel. A widespread burn can leave you mildly dehydrated without you realizing it, which slows healing and can make you feel fatigued or lightheaded. Increase your water intake for the first two to three days after a burn, even if you don’t feel particularly thirsty.
What to Avoid on Sunburned Skin
Some products that seem like they should help actually make things worse. Petroleum jelly and heavy ointments create a seal over the skin that traps heat inside, intensifying the burning sensation. Products containing benzocaine or lidocaine (common in spray-on sunburn treatments) can also trap heat and sometimes trigger allergic reactions on already-irritated skin.
Alcohol-based lotions and aftershaves dry out the skin further and can sting badly on a fresh burn. Similarly, any active skincare ingredients you normally use should be paused until the burn fully heals. Retinoids, glycolic acid, lactic acid, and benzoyl peroxide all thin or exfoliate the outer layer of skin, which is the last thing damaged skin needs. Wait until all redness, peeling, and tenderness are completely gone before reintroducing these products.
Resist the urge to peel flaking skin. When sunburned skin peels, it’s shedding dead cells while new skin forms underneath. Pulling off peeling sheets before they’re ready can expose raw, unprotected skin to infection and scarring.
When a Sunburn Needs Medical Attention
Most sunburns, even painful ones, heal on their own within a week or two. But a severe reaction, sometimes called sun poisoning, goes beyond typical redness and soreness. Watch for fever, chills, nausea, dizziness, rapid pulse, or extreme thirst. Severe blistering that covers a large area, eyes that are painful or light-sensitive, or signs of dehydration like no urine output or sunken eyes all signal that your body needs more help than home remedies can provide.
The Healing Timeline
A mild sunburn typically peaks in redness and pain within 24 to 36 hours, then gradually improves over three to five days. Moderate burns with more intense redness may take a full week, with peeling starting around day three or four. Blistering burns can take two weeks or longer to fully resolve. Throughout this process, keep the skin moisturized with a gentle, fragrance-free lotion (aloe-based is ideal), stay out of direct sun, and wear loose, soft clothing over the affected areas. Your skin is rebuilding its protective barrier, and everything you do during this window either supports or delays that process.