What to Put on Sun Poisoning (and What to Avoid)

Cool compresses, pure aloe vera gel, and an over-the-counter anti-inflammatory like ibuprofen form the core of sun poisoning treatment. What you leave off your skin matters just as much: benzocaine-based sprays, petroleum jelly, vinegar, and butter can all make things worse. The term “sun poisoning” isn’t a formal medical diagnosis but generally refers to a severe sunburn, sometimes accompanied by blistering, swelling, nausea, or fever, and the approach to treating it depends partly on how deep the damage goes and which products actually have evidence behind them.

What Sun Poisoning Actually Does to Your Skin

Sunlight, particularly its ultraviolet B component, triggers a cascade of inflammation that unfolds over hours. When UV radiation hits skin cells, it damages cell membranes and releases fatty acids that get converted into prostaglandins, the same inflammatory molecules involved in fever and pain elsewhere in the body. Prostaglandins like PGE2 drive the redness, heat, and tenderness that peak somewhere between 24 and 48 hours after exposure.

1PubMed Central. The sunburn response in human skin is characterized by sequential eicosanoid profiles that may mediate its early and late phases

The burn also disrupts the skin’s barrier function. Transepidermal water loss, the rate at which moisture escapes through your skin, rises significantly after UV exposure and tends to peak around day four.

2PubMed. Ultraviolet B-induced alterations of the skin barrier and epidermal calcium gradient

That’s why severely sunburned skin feels tight and papery: it’s literally leaking water faster than healthy skin would. Understanding this timeline helps explain why treatment in the first few hours matters and why recovery takes days, not hours.

Cool Compresses and Hydration Come First

Before reaching for any product, cool the skin. A damp cloth or a lukewarm shower (not ice-cold, which can shock damaged skin and constrict blood vessels) draws heat out and provides immediate pain relief. Repeat compresses for 15 to 20 minutes at a time, several times a day, particularly during the first 48 hours when inflammation is climbing.

Drink more water than you think you need. Because your skin barrier is compromised and actively losing moisture, your body’s fluid demands go up. If you’re also dealing with nausea, headache, or dizziness, which sometimes accompany severe sun exposure, dehydration is a real risk. Sip water or an electrolyte drink steadily rather than chugging large amounts at once.

Aloe Vera Gel

Aloe vera is one of the few topical remedies with a long track record for burns. The fresh inner gel of the plant has traditionally been applied directly to burns and wounds, where it hydrates and cools the skin while supporting healing.

3Journal of Integrative Dermatology. Healing from the Desert: Southwestern U.S. Indigenous Botanicals for Inflammatory Skin Conditions – Section: 1.4. Aloe (Aloe vera)

If you’re buying a commercial gel rather than slicing open a leaf, look for products where aloe is the first ingredient and that are free of added fragrances, alcohol, and dyes. Alcohol-based aloe gels can sting on contact and further dry out damaged skin, which defeats the purpose. Store the gel in the refrigerator for an added cooling effect when you apply it.

Topical Corticosteroids and Their Limits

You’ll sometimes hear that hydrocortisone cream helps with sunburn, and the evidence is real but has an important caveat about timing. In one controlled trial, two mid- to high-potency topical corticosteroids applied to sunburned skin produced a measurable reduction in the sunburn reaction compared to untreated areas, with the differences becoming significant around days four and five.

4Clinical and Experimental Dermatology. A randomized, controlled study of the safety and efficacy of topical corticosteroid treatments of sunburn in healthy volunteers

But another randomized trial found that when moderate- or high-potency corticosteroids were applied six or 23 hours after UV exposure, they did not provide a clinically useful decrease in redness. Only application 30 minutes before exposure with a high-potency steroid showed a relevant effect.

5PubMed. Topical corticosteroids in the treatment of acute sunburn: a randomized, double-blind clinical trial

In practical terms, this means that slathering on hydrocortisone a full day after a bad burn probably won’t do much for the redness itself, though it may still help with itching as the skin begins to heal. If you’re going to use it, apply it as early as possible after exposure and keep your expectations modest. Over-the-counter hydrocortisone (1%) is the accessible option; higher-potency prescription steroids aren’t typically warranted for sunburn and carry their own side effects with extended use.

Ibuprofen and Other Oral Anti-Inflammatories

Because sunburn inflammation is driven by prostaglandins, a drug that blocks prostaglandin production should, in theory, help. Ibuprofen does exactly that. A placebo-controlled study showed that ibuprofen reduced both redness and heat-pain sensitivity in UV-irradiated skin, with statistically significant improvements at moderate and minimal burn doses.

6PubMed Central. Placebo controlled, crossover validation study of oral ibuprofen and topical hydrocortisone-21-acetate for a model of ultraviolet B radiation (UVR)-induced pain and inflammation

An earlier trial, however, told a slightly less enthusiastic story: while ibuprofen significantly reduced observer-rated redness, it wasn’t significantly better than placebo for pain, itching, or general discomfort at standard burn doses. The drug showed more benefit only after higher-dose UV exposure.

7JAMA Dermatology. Ibuprofen in the Treatment of UV-B-Induced Inflammation

The takeaway: ibuprofen helps, especially for more severe burns, but it’s not a miracle fix. Take it at standard recommended doses and start as soon as possible after sun exposure. Acetaminophen (Tylenol) can manage pain but won’t reduce the inflammation the way ibuprofen or naproxen will, since it doesn’t target prostaglandins in the skin.

What to Avoid Putting on Sun Poisoning

Some of the most commonly reached-for remedies are among the worst choices for sun-damaged skin. Here’s what to skip and why.

  • Benzocaine sprays and creams: Products like Solarcaine contain benzocaine, a topical anesthetic that numbs on contact. The problem is that benzocaine is frequently linked to allergic contact dermatitis, producing redness and, in severe cases, blistering right on top of your already damaged skin. Because it appears in so many over-the-counter products, repeated exposure increases the chance of becoming sensitized, meaning each subsequent use is more likely to trigger a reaction.
    • 8DermNet. Allergy to benzocaine
  • Petroleum jelly and heavy ointments: A thick occlusive layer traps heat in burned skin. Your skin is already struggling to regulate its temperature and lose excess moisture; sealing it under an airtight film slows cooling and can intensify discomfort. Light, water-based moisturizers are a better fit once the acute heat has passed.
  • Vinegar or apple cider vinegar: A persistent home remedy, but acetic acid applied to already compromised skin risks chemical irritation or outright damage. A review of vinegar in dermatology noted that while vinegar is generally safe on intact skin, inappropriate use can result in skin damage.
    • 9Wiley Online Library. Acetic acid and the skin: a review of vinegar in dermatology
  • Butter, coconut oil, or cooking oils: Like petroleum jelly, these form a barrier that traps heat. Unlike petroleum jelly, some cooking oils can also go rancid on warm skin, creating an environment that invites bacterial growth on a compromised barrier.
  • Products with fragrance, retinoids, or exfoliating acids: Anything designed to stimulate skin turnover, like glycolic acid, salicylic acid, or retinol, will amplify irritation on a burn. Fragranced lotions contain volatile compounds that can sting and sensitize inflamed skin. Switch to fragrance-free everything until the burn has fully healed.

Handling Blisters

Blisters mean the burn has reached a second-degree depth, and they change the management approach. The fluid inside a blister is sterile and acts as a natural wound dressing, cushioning the raw skin beneath. Popping blisters removes that protection and opens a direct path for infection.

A case report of a young, otherwise healthy woman whose sunburn deteriorated to a deep second-degree wound illustrates what can go wrong. The authors attributed the worsening partly to inappropriate wound care, emphasizing that the tissue surrounding a burn’s center exists in a zone of reduced blood flow where cells are still viable but vulnerable. Poor management can push that borderline tissue toward death rather than recovery.

10Journal of Wound Management and Research. Sunburn Deteriorated to a Deep Second-Degree Wound in a Healthy Young Female without Risk Factors

If blisters are small, leave them intact and cover them loosely with a non-stick bandage. If a blister breaks on its own, gently clean the area with mild soap and water, apply a thin layer of antibiotic ointment, and cover it. Blisters that are large, spreading, or showing signs of infection (increasing pain, pus, red streaking) warrant a visit to a doctor. The same goes for blistering that covers a large body area: that level of damage can cause significant fluid loss and sometimes needs professional wound care.

When to See a Doctor

Most sunburns, even painful ones, resolve at home. But sun poisoning sometimes crosses into territory that needs medical attention. Seek care if you experience:

  • Widespread blistering: Blisters over more than about 20% of your body, or blisters on your face, hands, or genitals.
  • High fever or chills: A temperature above 101°F (38.3°C) alongside a burn suggests a systemic inflammatory response that may need monitoring.
  • Severe dehydration signs: Dizziness that doesn’t resolve with fluids, very dark urine, or fainting.
  • Signs of infection: Increasing redness days after the burn, pus, swelling, or red streaks spreading from a blistered area.
  • Confusion or altered consciousness: Heatstroke can accompany severe sun exposure and is a medical emergency.

In clinical settings, severe cases may be treated with stronger prescription corticosteroids, IV fluids, or specialized wound dressings. For most people, though, the at-home approach outlined above handles the situation.

Restoring the Skin Barrier During Recovery

Once the acute phase (the first three to five days of redness, swelling, and pain) passes, your skin enters a repair phase that can last weeks. The peeling that follows a bad burn is the body shedding dead cells, and the new skin underneath is thinner, more sensitive, and more vulnerable to UV damage than your normal skin.

Moisturizers that contain ceramides can help during this phase. Ceramides are lipids that naturally make up a large portion of the skin barrier, and replenishing them helps repair barrier defects, preserve hydration, and control inflammation.

11PubMed Central. Ceramides and Skin Health: New Insights

Look for fragrance-free moisturizers listing ceramides among the first several ingredients. Apply them to damp skin after bathing to lock in moisture. Avoid picking or peeling flaking skin, which can tear into still-healing layers beneath.

Sun protection during recovery is non-negotiable. Newly healed skin burns faster than normal skin, and re-burning the same area before it has fully recovered compounds the damage. Use a broad-spectrum sunscreen of SPF 30 or higher on any exposed healing skin, and cover up with clothing when possible. This heightened sensitivity can persist for several weeks after the visible burn has faded.

Could It Be Something Other Than Sunburn?

Not every painful skin reaction after sun exposure is a straightforward burn. Polymorphous light eruption, or PLE, is a common photosensitivity condition affecting an estimated 10 to 20 percent of the population. It shows up as itchy red bumps, small blisters, or plaques on sun-exposed skin, and it can look a lot like a bad sunburn, but it behaves differently. PLE tends to appear in spring or early summer when skin that’s been covered all winter first sees significant sun, and it’s driven mainly by UVA rather than UVB.

12Wiley Online Library. Polymorphous light eruption

The distinction matters because PLE is an immune reaction, not thermal damage, and its treatment focuses on gradual UV hardening and sometimes prescription-strength topicals rather than the burn-care approach described above. If you get bumpy, itchy rashes every time you’re in the sun, even after relatively brief exposure, it’s worth mentioning to a dermatologist rather than assuming you just burn easily.

When Medications Make Your Skin More Vulnerable

Some people end up with what looks like sun poisoning after surprisingly little time outdoors, and their medication is the reason. Drug-induced photosensitivity occurs when a drug absorbs UV radiation, usually UVA, and triggers chemical reactions that damage skin cells directly or provoke an immune response.

13PubMed. Drug-induced photosensitivity: new insights into pathomechanisms and clinical variation through basic and applied science

The list of photosensitizing drugs is long and includes some of the most commonly prescribed medications. Certain diuretics like hydrochlorothiazide, some antibiotics (particularly tetracyclines and fluoroquinolones), several NSAIDs, and some psychiatric medications can all increase your skin’s reactivity to sunlight. The mechanism often involves the drug generating reactive oxygen species when hit by UV light, which then damage cell membranes, proteins, and DNA.

14PubMed. Drug-induced cutaneous photosensitivity: incidence, mechanism, prevention and management

If you’re on a new medication and experience an exaggerated burn from what seemed like modest sun exposure, check the drug’s information leaflet or ask your pharmacist whether photosensitivity is a known side effect. The treatment for the burn itself is the same as outlined above, but the prevention strategy changes: you need stricter sun avoidance, higher SPF, and protective clothing, because your burn threshold is temporarily lower than normal. Drug-induced photosensitivity is a growing concern as the number of photosensitizing medications in clinical use continues to expand.

15PubMed Central. Drug-induced photosensitivity: culprit drugs, potential mechanisms and clinical consequences

Why Blistering Burns Carry Long-Term Risk

Beyond the immediate pain, a blistering sunburn leaves a mark on your skin cells that outlasts the visible damage. A study examining mutation patterns in melanoma patients found that those with a history of blistering sunburn carried a higher burden of genetic mutations in their tumors: an average of 1.67 mutations per patient, compared to 1.16 in patients without a blistering sunburn history.

16PubMed. Impact of Sun Exposure and Tanning Patterns on Next-Generation Sequencing Mutations in Melanoma

UV radiation doesn’t just inflame the skin; it directly damages DNA in skin cells, causing mutations that accumulate with each severe exposure. Erythema, photosensitivity, and immune suppression are the acute effects, while photoaging and cancer represent the long-term consequences.

17PubMed. Sun exposure and skin disease

This isn’t meant to scare you while you’re already dealing with a painful burn, but it does underscore why aggressive prevention after a blistering episode matters. Your skin cells have already accumulated some UV-induced DNA damage. Minimizing future severe burns reduces the cumulative mutation load. Regular skin checks, either self-exams or annual dermatologist visits, become more important if you’ve had multiple blistering sunburns over your lifetime, particularly during childhood or adolescence when skin cells are dividing rapidly.

A Note on Vitamins C and E

You may come across claims that oral vitamins C and E can treat or prevent sunburn. A small study found that taking combined vitamins C and E raised the dose of UV needed to produce a sunburn. The median minimal erythemal dose (the amount of UV that triggers redness) increased from 80 to 96.5 mJ/cm² in the vitamin group, while it actually declined in the placebo group.

18Journal of the American Academy of Dermatology. Protective effect against sunburn of combined systemic ascorbic acid (vitamin C) and d-alpha-tocopherol (vitamin E)

That’s a real but modest increase, roughly a 20% bump in UV tolerance. It’s nowhere near the protection offered by sunscreen or clothing, and it took days of supplementation before exposure to show the effect. Vitamins C and E are not a treatment for an existing burn, and they’re not a substitute for sunscreen. But if you burn easily and want to stack every small advantage, there’s some basis for adding them to your routine as a complement to standard sun protection, not a replacement for it.