Cool water applied to sunburned skin within the first hour or two is the single most effective thing you can do to limit damage and ease the pain. After that initial window, recovery becomes a process of managing inflammation, protecting the skin barrier, and waiting for your body to repair itself. Most sunburns resolve within a week, but how you treat the skin during that time affects both how miserable you feel and how well the skin heals. The science on sunburn treatment is, frankly, less impressive than you might expect: a large review of 40 studies found that the majority concluded common remedies like corticosteroids, anti-inflammatory drugs, antihistamines, and emollients were ineffective at actually shortening recovery time. That does not mean nothing helps, but it shifts the goal from “curing” a sunburn to reducing pain, preventing further injury, and giving your skin what it needs to heal on its own terms.
Why Sunburn Hurts and What Is Actually Happening
Sunburn is an inflammatory response to ultraviolet radiation damaging the DNA in your skin cells. The redness, heat, swelling, and tenderness you feel are driven by your immune system reacting to that damage. Within the first 24 to 48 hours, your skin ramps up production of inflammatory compounds called prostaglandins, which dilate blood vessels and produce the characteristic redness and warmth.1PubMed Central. The sunburn response in human skin is characterized by sequential eicosanoid profiles that may mediate its early and late phases This process peaks somewhere around 24 hours after exposure and then gradually subsides over the next several days as damaged cells are cleared away and new ones take their place.
Understanding this timeline matters for treatment. The inflammation ramps up for a full day after you come inside, which is why a sunburn often looks and feels worse the morning after. Anything you do in the first few hours has a disproportionate impact because you are intervening before the inflammatory cascade fully takes hold. Once redness and swelling have peaked, your options narrow mostly to comfort measures and skin protection.
The First Thing to Do: Cool Water, Not Ice
Running cool water over sunburned skin or applying cool, damp cloths is the most time-tested and well-supported first step. Research on burn first aid consistently shows that cooling the wound reduces tissue damage and speeds healing. A study evaluating different cooling methods found that both tap water compresses and hydrogel treatments significantly lowered skin temperature and improved healing compared to untreated burns.2PubMed. Cooling the burn wound: evaluation of different modalites The ideal water temperature is around 15°C, which is roughly cool tap water. Research comparing different temperatures found that while ice-cold water (around 2°C) dropped skin temperature fastest, cool tap water at 15°C generally produced better outcomes for healing and scar appearance.3PubMed. The optimal temperature of first aid treatment for partial thickness burn injuries
The practical takeaway: aim for a cool shower or cool wet towels for about 20 minutes. Avoid ice packs directly on the skin. Ice can feel like relief in the moment, but it constricts blood vessels too aggressively and can cause additional tissue injury on top of the UV damage already done. A lukewarm-to-cool bath works well for widespread burns on the back, shoulders, and legs where compresses are awkward to keep in place.
Over-the-Counter Pain Relief
Ibuprofen is the go-to oral medication for sunburn discomfort, and for good reason. It blocks the same prostaglandins that drive the redness and swelling, so it tackles both the pain and the inflammation. Taking it early, ideally within the first few hours of noticing the burn, gives the best results because you are suppressing the inflammatory cascade before it peaks. Aspirin works through a similar mechanism. Acetaminophen (paracetamol) helps with pain but does not address inflammation, so it is a backup rather than a first choice.
That said, the evidence for oral anti-inflammatory drugs dramatically shortening sunburn recovery is thin. The review of treatment studies mentioned earlier found that most trials showed NSAIDs were ineffective at decreasing overall recovery time, even when they helped with symptom management. So take ibuprofen for comfort, but do not expect it to make your sunburn disappear a day sooner than it otherwise would.
What to Put on Your Skin
Once you have cooled the burn, the next question is what to apply topically. There is no shortage of products marketed for sunburn relief, so it helps to separate what the evidence actually supports from what just feels nice.
Aloe Vera
Aloe vera gel is probably the most popular sunburn remedy, and there is some scientific basis behind its reputation. The plant contains acemannan, a polysaccharide with documented anti-inflammatory properties and tissue-regeneration effects.4PubMed Central. A New Biomaterial Derived from Aloe vera-Acemannan from Basic Studies to Clinical Application Acemannan has been shown to accelerate healing and reduce inflammation in wound models.5Natural Product Communications. Acemannan, an Extracted Polysaccharide from Aloe vera: A Literature Review The cooling sensation of aloe gel also provides immediate subjective relief, especially if you store it in the refrigerator.
Where aloe vera falls short is in large, rigorous clinical trials specifically on sunburn. Most of the healing evidence comes from wound models and lab studies rather than randomized trials measuring how many days faster a sunburn resolves. It almost certainly will not hurt, and the anti-inflammatory and moisturizing properties are real, but it is not a miracle cure. Look for pure aloe gel or products with high aloe content and without added fragrances or alcohol, which can sting and dry out damaged skin.
Moisturizers and Emollients
Sunburned skin loses moisture rapidly through the damaged barrier. Applying a fragrance-free moisturizer or emollient after cooling helps trap water in the skin and reduces the tight, dry feeling. Products containing ceramides, hyaluronic acid, or petrolatum are especially effective at restoring the skin barrier. Apply moisturizer while the skin is still slightly damp from your cool shower to lock in hydration. Reapply several times a day as the skin heals, especially after bathing.
Avoid anything with retinoids, glycolic acid, salicylic acid, or other active exfoliants. Sunburned skin is already shedding damaged cells on its own schedule, and chemical exfoliants will irritate it further and slow the process.
Topical Corticosteroids
This is where expectations and evidence diverge sharply. Many people reach for hydrocortisone cream for sunburn, and some dermatologists recommend it. But the clinical data is genuinely mixed. A randomized, double-blind trial found that both moderate-potency and high-potency topical corticosteroids provided no clinically useful decrease in the sunburn reaction when applied 6 or 23 hours after UV exposure.6PubMed. Topical corticosteroids in the treatment of acute sunburn: a randomized, double-blind clinical trial However, a separate controlled trial comparing two specific corticosteroid formulations found that treated areas did show significantly less sunburn reaction by days 4 to 5 compared to untreated areas.7Clinical and Experimental Dermatology. A randomized, controlled study of the safety and efficacy of topical corticosteroid treatments of sunburn in healthy volunteers
The discrepancy likely comes down to timing, formulation, and how the studies measured outcomes. The negative trial applied steroids well after the inflammatory cascade was underway. The positive trial used specific formulations and found benefits only after several days. The honest read of the evidence: topical steroids might help modestly if applied early and used consistently, but they are not the dramatic fix that many people hope for. A low-strength hydrocortisone cream is unlikely to cause harm for a few days, but it probably will not transform your recovery either.
Oatmeal Baths and Barrier Repair
Colloidal oatmeal, the finely ground oat powder you can add to a lukewarm bath, has a surprisingly solid evidence base for calming irritated skin. Research has shown that colloidal oatmeal extracts reduce pro-inflammatory compounds and produce significant clinical improvements in skin dryness, scaling, roughness, and itch.8PubMed. Anti-inflammatory activities of colloidal oatmeal (Avena sativa) contribute to the effectiveness of oats in treatment of itch associated with dry, irritated skin More recent research has found that fermented oat extracts can help repair the skin barrier after UV damage, reducing water loss through the skin and significantly decreasing the number of sunburn cells.9Journal of Dermatologic Science and Cosmetic Technology. Dual-action fermented oats (Avena sativa L.): Anti-inflammatory and skin barrier restoration
For sunburn specifically, an oatmeal bath works best during the itchy, peeling phase that sets in a few days after the initial burn. The anti-itch and anti-inflammatory effects are complementary to what moisturizers do: the oatmeal calms the immune reaction while the bath rehydrates the skin. You can find colloidal oatmeal bath products at most pharmacies. Soak for 15 to 20 minutes in lukewarm water, then pat dry gently and apply moisturizer.
Hydration and Rest
Sunburn pulls fluid toward the skin surface, and if you were out in the sun long enough to burn, you were also likely sweating and may already be mildly dehydrated. Drinking extra water in the days following a sunburn supports the healing process from the inside. You do not need electrolyte drinks unless you are also dealing with heat exhaustion, but water intake matters more than people realize for skin recovery.
Sleep can also be disrupted after a sunburn. The pain and heat make it hard to get comfortable, and the inflammatory response itself can interfere with rest. Sleeping in a cool room, using light cotton sheets, and taking ibuprofen before bed can help. Some people find that sleeping on a clean, cool towel over their pillow reduces friction on burned facial skin.
When Blisters Form
Blistering sunburn means the damage has reached deeper into the skin. The fluid inside the blister is plasma that has leaked from damaged blood vessels, and the intact blister roof serves as a natural sterile bandage. The clinical debate over whether to leave blisters intact or drain them has gone back and forth for decades, with arguments on both sides. Leaving blisters intact preserves a natural biological barrier, while draining them may reduce pressure and discomfort.10Oxford Academic. Management of Blisters in the Partial-Thickness Burn: An Integrative Research Review
For most sunburn blisters, the safest approach at home is to leave them alone. Do not pop them, peel off the skin, or apply adhesive bandages directly over them. If a blister breaks on its own, gently clean it with mild soap and water, apply an antibiotic ointment, and cover it with a non-stick bandage. Large blisters, blisters that cover a significant area, or blisters showing signs of infection (increasing redness, warmth, pus, or red streaks) warrant a visit to a healthcare provider.
Blistering sunburn also raises the threshold for considering medical attention in general. If blisters cover more than about 20 percent of your body, or if the burn is accompanied by fever, chills, nausea, or severe headache, those are signs of a more serious systemic reaction that may need professional care. Children and older adults should be evaluated sooner than healthy young adults with similar-looking burns.
Hell’s Itch
Some people develop an agonizing, deep itching sensation 24 to 72 hours after a sunburn that goes far beyond normal post-burn itchiness. Known informally as “hell’s itch,” this condition involves a burning, almost unbearable pruritus that does not respond to the usual remedies. A case series documented patients rating the itch at 8 to 10 out of 10, with standard treatments including antihistamines, topical lidocaine, NSAIDs, aloe vera, and cold compresses all failing to provide relief.11PubMed Central. Hell’s Itch: A Case Series of a Debilitating Post-Sunburn Pruritic Syndrome in a Healthy Young Adult
The condition is poorly understood and frequently misdiagnosed. Online communities have shared anecdotal reports of beta-alanine supplements providing rapid but temporary relief, and the case series noted patients experiencing improvement after taking beta-alanine, though this remains unproven in any controlled setting. If you experience deep, severe itching after a sunburn that is not responding to anything, knowing that this phenomenon exists and has a name can at least reduce the panic. A healthcare provider may be able to try prescription-strength options, though evidence guiding treatment is essentially absent.
Medications That Make Sunburn Worse
If you burned more easily or more severely than you expected, one possible explanation is drug-induced photosensitivity. A number of common medications make your skin react more strongly to UV radiation. Among the most consistently implicated are the antibiotic doxycycline, the blood pressure medication hydrochlorothiazide, the anti-inflammatory naproxen, and the antifungal voriconazole.12SpringerLink. Drug-Induced Photosensitivity-An Update: Culprit Drugs, Prevention and Management Other culprits include certain psychiatric medications, heart rhythm drugs, and some chemotherapy agents.
Photosensitivity reactions can look exactly like an exaggerated sunburn, or they can present as a rash in sun-exposed areas. If you started a new medication recently and then experienced an unusually severe burn, check the drug’s side-effect information or ask your pharmacist. You do not necessarily need to stop the medication, but you may need to be significantly more careful about sun protection while taking it.
What Sunburn Means for Long-Term Skin Health
Beyond the immediate discomfort, sunburns carry consequences that accumulate over a lifetime. A comprehensive meta-analysis found that people who had ever been sunburned had a roughly 60 percent higher risk of developing melanoma compared to those who had not, with childhood sunburns carrying the highest risk (about 90 percent increased odds).13PubMed Central. Sunburns and risk of cutaneous melanoma, does age matter: a comprehensive meta-analysis The risk increased with the total number of sunburns and was elevated regardless of whether the burns occurred in childhood, adolescence, or adulthood.
This does not mean a single mild sunburn guarantees future problems, but it does mean that repeated blistering burns, especially in youth, represent a meaningful risk factor. The DNA damage from each burn accumulates, and the repair mechanisms are not perfect. Treating the current sunburn well is important, but preventing the next one matters more for your long-term health.
Preventing the Next Burn
Once you have dealt with a sunburn, the burned skin is especially vulnerable for days to weeks afterward. Even after the redness and peeling resolve, the new skin underneath is more sensitive to UV damage than your skin normally would be. Avoid direct sun exposure on healing skin, and when you do go outside, cover up.
Clothing is actually a more reliable form of sun protection than sunscreen for the areas it covers, but not all fabrics are equal. The UV protection a garment provides depends on the fabric’s porosity, type, color, weight, and thickness, and those properties change with wear: stretching, getting wet, and repeated laundering can all alter how much UV gets through.14JAMA Dermatology. Defined UV Protection by Apparel Textiles Tightly woven, dark-colored fabrics block more UV than thin, light-colored ones. A dry, dark cotton shirt provides reasonable protection. A wet white T-shirt provides almost none. Clothing labeled with a UPF (ultraviolet protection factor) rating has been specifically tested for UV transmission.
For exposed skin, broad-spectrum sunscreen with an SPF of at least 30, applied generously and reapplied every two hours during exposure, remains the standard recommendation. The most common mistake is not using enough: most people apply roughly a quarter to half the amount used in the testing that determines SPF ratings, which means the real-world protection is substantially less than what is on the label. A full body application for an average adult requires about a shot glass worth of lotion.
A Quick-Reference Timeline for Sunburn Care
Sunburn care is not a single action but a sequence that shifts as the burn progresses through its phases.
- First 1-2 hours: Cool the skin with tap water or damp cloths for 20 minutes. Take ibuprofen. Drink water.
- Hours 2-24: Apply aloe vera gel or a fragrance-free moisturizer. Continue ibuprofen on schedule. Avoid further sun exposure.
- Days 1-3: Inflammation peaks and then begins to subside. Keep moisturizing frequently. Wear loose, soft clothing over burned areas. Consider an oatmeal bath if itching becomes significant.
- Days 3-7: Peeling begins as dead skin cells are shed. Do not pick or peel the skin manually. Continue moisturizing. The new skin underneath is fragile and especially sun-sensitive.
- Days 7-14: Most mild to moderate sunburns have resolved. Healing skin may appear slightly lighter or darker than surrounding areas temporarily. Continue protecting the area from sun.
Blistering burns follow the same general timeline but heal more slowly and carry a higher risk of scarring or infection. Any burn accompanied by widespread blistering, high fever, confusion, or signs of heat stroke should be evaluated by a medical professional promptly.