How to Treat Sun Poisoning: Home Remedies and When to See a Doctor

Knowing how to treat sun poisoning quickly can keep a painful sunburn from turning into something more serious. Despite the name, sun poisoning is not an actual poisoning — it usually refers to a severe sunburn that triggers an inflammatory response, producing symptoms that go beyond ordinary redness, such as blistering, swelling, chills, nausea, and dehydration. The term is also used for sun-triggered skin reactions like polymorphous light eruption.

If you are dealing with intense sunburn symptoms, understanding how to treat sun poisoning at home — and, just as importantly, when to seek medical care — is what keeps a bad burn from becoming dangerous. This guide covers evidence-based home care and the warning signs that call for a professional, drawing on guidance from the American Academy of Dermatology (AAD), MedlinePlus, and the CDC. It is general education, not medical advice; if you are worried about your symptoms, contact a clinician.

What Is Sun Poisoning?

“Sun poisoning” is a common, informal label for a severe reaction to ultraviolet (UV) radiation. While a mild sunburn affects mostly the outer layer of skin (the epidermis), sun poisoning suggests deeper skin damage that can trigger a more widespread — and sometimes whole-body — inflammatory response.

The term is used loosely and can describe several distinct conditions:

• Severe sunburn: deep redness, intense pain, widespread blistering, and swelling beyond a typical burn, sometimes with chills, headache, nausea, or a low-grade fever.
• Polymorphous light eruption (PMLE): an itchy, bumpy rash on sun-exposed skin, common in people not yet acclimated to strong sunlight (such as early in the season or on a tropical trip).
• Solar urticaria: hives that develop within minutes of sun exposure — a rare, allergic-type reaction to UV light.

For a closer look at the range of symptoms and what to watch for, see our guide on symptoms of sun poisoning. If you are unsure which reaction you are experiencing — or the rash is spreading, severe, or recurring — a clinician or dermatologist can help pin it down.

Immediate Home Treatment for Sun Poisoning

If you suspect sun poisoning, start these steps as soon as possible:

Get out of the sun immediately. Move indoors or into full shade. Continued UV exposure deepens the burn and worsens symptoms, and skin damage keeps developing even after you first feel the burn.

Cool the skin. The AAD suggests frequent cool (not ice-cold) baths or showers to ease the pain, then patting the skin gently dry. Cool, damp compresses applied for short stretches also help. Avoid putting ice or ice water directly on burned skin, which can worsen the injury to already-compromised skin.

Hydrate. A sunburn draws fluid to the skin’s surface and away from the rest of the body, so drink extra water. Watch for signs of dehydration — dark urine, dizziness, dry mouth, and a rapid heartbeat — and step up fluids if they appear.

Consider an over-the-counter pain reliever. An OTC anti-inflammatory such as ibuprofen (or aspirin for adults) can reduce swelling and discomfort; acetaminophen can ease pain but does not reduce inflammation. Use any medication exactly as directed on the package label, and follow the dosing and warnings printed there. Do not give aspirin to children or teens, and talk to a pharmacist or clinician before combining medications or if you have kidney disease, ulcers, are pregnant, or take other drugs.

Apply soothing topical care:

• Aloe vera or soy: the AAD recommends a moisturizer containing aloe vera or soy to soothe sunburned skin. Use pure products without added alcohol, fragrance, or numbing agents like lidocaine, which can irritate.
• Gentle moisturizer: after cooling, apply a fragrance-free moisturizer while the skin is still damp to reduce peeling and lock in moisture. Fragrance-free lotions such as CeraVe, Vanicream, or Eucerin are reasonable options.
• Calamine or cool compresses: these can further calm itching and stinging. OTC 1% hydrocortisone cream may reduce inflammation and itch on non-blistered skin — use it according to the package directions.

Skip products that promise to “numb” the pain with ingredients ending in “-caine,” which can trigger reactions on damaged skin, and avoid petroleum-heavy ointments on fresh, oozing burns until the skin has started to settle.

Treating Blisters and Peeling Skin

Blistering is a hallmark of severe sunburn and needs careful handling:

Do not pop blisters. Blisters are your body’s natural bandage, protecting the raw skin underneath from infection. The AAD advises letting them heal on their own. If a blister breaks by itself, gently clean the area with mild soap and water and cover it with a non-stick bandage; petroleum jelly can help keep the surface moist while it heals.

Managing peeling skin:

• Do not peel or pick at flaking skin — this can cause scarring and raise infection risk.
• Keep moisturizing to soften peeling skin.
• Let dead skin shed naturally.
• Wear soft, loose clothing over affected areas.

Infection prevention: damaged skin is vulnerable to bacterial infection. Keep blistered and peeling areas clean, and watch for warning signs of infection — increasing redness, warmth, swelling, pus, red streaks spreading from the area, or a new fever. If any of these appear, contact a clinician promptly.

When to See a Doctor — and When It’s a 911 Emergency

Most sun poisoning can be managed at home, but certain symptoms need professional care, and a few are true emergencies.

Call 911 or go to the nearest ER right away for signs of heat stroke. Heat stroke is a life-threatening emergency — not just a bad sunburn — and can occur alongside severe sun exposure. According to MedlinePlus and the CDC, call 911 immediately if a person has a very high body temperature (heat stroke is often marked by a temperature above 104°F / 40°C), confusion or altered behavior, slurred speech, a rapid pulse or rapid breathing, fainting or loss of consciousness, or seizures. Skin may become hot and, in heat stroke, sweating can stop. While waiting for help, move the person to a cool place, remove excess clothing, and cool them with wet cloths or by placing cold compresses on the neck, armpits, and groin. Do not give fever-reducing medicines for heat stroke — they do not help and may cause harm — and do not give fluids to anyone who is confused or not fully alert.

Go to the ER or seek urgent care for:

• Widespread blistering, or blistering on the face, hands, or genitals
• A high fever with chills, or a fever that does not improve
• Signs of severe dehydration (confusion, fainting, very dark urine, or little to no urination)
• Severe headache, vision changes, or vomiting that prevents you from keeping fluids down
• Signs of a spreading skin infection (expanding redness, warmth, pus, or red streaks)

See a doctor (non-emergency) if:

• Blisters cover a large area of the body
• Pain is not controlled by OTC medication used as directed
• Symptoms do not improve after a few days of home treatment, or they get worse
• You have a health condition, take medications that increase sun sensitivity, or are caring for a young child, older adult, or someone who is pregnant

Severe sunburn combined with heat-related illness can be dangerous and may require emergency treatment such as IV fluids and wound care. When in doubt, err on the side of getting checked — especially for infants, older adults, and anyone with chronic illness.

Medical Treatments for Severe Sun Poisoning

When home care is not enough, a clinician — not self-treatment — may recommend:

Prescription anti-inflammatories: for widespread, severe cases with significant swelling, a clinician may prescribe a short course of oral corticosteroids or a prescription-strength topical steroid. These are used only under medical direction; do not attempt to source or self-dose steroids.

Prescription pain management: for severe pain, a clinician may adjust your medication plan or prescribe something stronger.

IV fluids: for significant dehydration, intravenous fluids restore hydration faster and more reliably than drinking alone.

Prescription burn creams and wound care: for extensive blistering or skin breakdown, a clinician may use a prescription antibacterial burn cream and professional wound care to prevent infection and support healing.

For related health information, visit our conditions guide. Any prescription treatment should be directed by a qualified clinician who knows your medical history.

Recovery Timeline and Aftercare

Recovery varies with severity:

• Mild sun poisoning: a few days for redness and pain to ease; peeling may continue for one to two weeks.
• Moderate sun poisoning with blisters: roughly one to two weeks for blisters to heal; complete skin recovery may take two to three weeks.
• Severe sun poisoning: two to four weeks or longer, and it can leave temporary or, occasionally, lasting skin changes.

Aftercare guidelines:

• Stay out of the sun until the burn has fully healed.
• Keep moisturizing daily during recovery.
• Once healed, protect the area with clothing and broad-spectrum SPF 30 or higher sunscreen.
• New skin after peeling is extra sensitive to UV and burns more easily.
• Monitor moles or skin changes in the burned area and report anything new to a clinician or dermatologist.

The CDC notes that severe, blistering sunburns — especially in childhood and adolescence — raise lifetime risk of melanoma and other skin cancers, which is why prevention and proper treatment matter so much.

Frequently Asked Questions

How long does sun poisoning last?

Acute symptoms (pain, redness, swelling) usually last several days, with blisters taking up to about two weeks to heal and peeling continuing for one to three weeks. Complete recovery from a severe case can take a month or longer. See a clinician if symptoms are severe or not improving.

Can you get sun poisoning on a cloudy day?

Yes. A significant share of UV rays can penetrate cloud cover, and UV also reflects off water, sand, snow, and concrete. You can burn in partial shade or on an overcast day, which is why daily sun protection matters even when it is not sunny.

Is sun poisoning the same as heat stroke?

No. Sun poisoning is UV damage to the skin, while heat stroke is a dangerous rise in body temperature from overheating. They can occur together during prolonged outdoor exposure. Heat stroke is a medical emergency — call 911 for high body temperature, confusion, fainting, rapid pulse, or seizures, regardless of any sunburn.

Should I go to urgent care for sun poisoning?

Consider urgent care for extensive blistering, a fever that will not settle, signs of dehydration, or symptoms that worsen after a couple of days of home care. Go directly to the ER or call 911 for signs of heat stroke — high temperature with confusion, fainting, or a racing pulse.

Protect Your Skin and Act Fast When Burns Are Severe

Knowing how to treat sun poisoning lets you manage this painful condition at home in most cases: get out of the sun, cool the skin, hydrate, use an OTC pain reliever as directed, apply aloe or a gentle moisturizer, and leave blisters intact. Prevention beats treatment, so apply broad-spectrum sunscreen, reapply it regularly, wear protective clothing, and limit sun exposure during peak UV hours (roughly 10 a.m. to 4 p.m.). Above all, recognize the emergencies: call 911 for signs of heat stroke, and seek prompt care for widespread blistering, high fever, severe dehydration, or a spreading infection. When symptoms are severe or you are simply unsure, do not wait — get medical help.

Sources

• American Academy of Dermatology (AAD) — how to treat sunburn: cool baths or showers, aloe vera/soy moisturizer, OTC pain relievers, extra water, leaving blisters intact, and when to see a dermatologist
• MedlinePlus (U.S. National Library of Medicine) — sunburn care and heat emergencies/heat stroke: emergency warning signs, temperature thresholds, first aid, and avoiding fever reducers for heat stroke
• Centers for Disease Control and Prevention (CDC) — extreme heat and heat-related illness (recognizing heat stroke vs. heat exhaustion and when to call 911); UV exposure and skin-cancer risk