Sunburn treatment: When home care isn't enough

Most sunburns are painful but self-limiting — they sting, they peel, and they heal in a few days with basic care. But not every sunburn falls into that category. A blistering burn covering a large portion of the body, a sunburn accompanied by fever and vomiting, or any sunburn in an infant requires medical attention. Here's how to tell where your sunburn falls on that spectrum, how to treat the common kind at home, and when to see a provider the same day.

Understanding sunburn severity

Sunburn is a radiation burn caused by ultraviolet (UV) light, primarily UVB radiation. Like thermal burns, sunburns are classified by depth:

• First-degree sunburn — involves only the outer layer of skin (epidermis). The skin is red, painful, warm to the touch, and may swell slightly. No blisters. This is the most common type and heals within 3–5 days.
• Second-degree sunburn — extends into the deeper layer of the skin (dermis). Blisters form as the body moves fluid between layers to protect damaged tissue. The burn is more painful, looks wet or raw, and takes 1–2 weeks to heal.

Third-degree burns from sun exposure are extremely rare — they require prolonged, intense UV exposure and are essentially only seen in cases of significant medical neglect. The vast majority of sunburns are first- or second-degree.

Home treatment for first-degree sunburns

For the typical painful-but-manageable sunburn, the goal is to reduce inflammation, relieve discomfort, and protect the skin while it heals:

• Cool the skin: Apply cool (not ice cold) water or cool compresses. Cool baths or showers can help. Avoid ice directly on burned skin, which can cause additional tissue damage.
• Moisturize: Apply aloe vera gel or a gentle, fragrance-free moisturizer while the skin is still slightly damp. Aloe vera has mild anti-inflammatory properties and is soothing. Avoid petroleum-based products like Vaseline or heavy creams in the first 24 hours — these trap heat in the skin.
• Reduce inflammation: Ibuprofen or aspirin (not acetaminophen, which doesn't address inflammation) taken at recommended doses helps reduce redness, pain, and swelling. Start within the first few hours for best effect.
• Hydrate: Sun exposure and burns cause fluid loss. Drink plenty of water to support healing and prevent dehydration.
• Stay out of the sun: Burned skin is extremely vulnerable to further UV damage. Keep the area covered or avoid sun exposure until fully healed.

Do not use topical anesthetics containing benzocaine on large sunburned areas — they can cause allergic reactions on damaged skin. Do not apply butter or oil to a fresh burn.

Blistering sunburns: what to do and what not to do

If blisters form, the burn has reached the dermis (second-degree). The most important rule: do not pop the blisters. Blisters are a natural protective response — the fluid creates a cushion over the damaged skin and significantly reduces infection risk. Popping them removes that protection.

If a blister ruptures on its own, gently clean the area with mild soap and cool water, apply a thin layer of antibiotic ointment (like bacitracin), and cover with a non-stick gauze bandage. Change the dressing daily and watch for signs of infection: increasing redness, warmth, pus, or fever.

Seek medical care for blistering sunburns that cover a large area of the body (larger than roughly the palm of the hand), or for any blistering burn involving the face, hands, feet, or genitals.

Sun poisoning: when a sunburn becomes a systemic illness

Sun poisoning is a colloquial term for an extreme UV overexposure reaction that goes beyond the skin. In addition to a severe sunburn, the person develops systemic symptoms:

• Fever and chills
• Nausea or vomiting
• Headache
• Dizziness or lightheadedness
• Dehydration
• In severe cases, confusion

Sun poisoning is not a formal medical diagnosis, but these symptoms indicate the body is responding to UV exposure beyond the skin. The systemic response — particularly dehydration, fever, and vomiting — is what makes it a medical situation. People with these symptoms need same-day evaluation and may need IV fluids to rehydrate.

Sunburns that require same-day medical attention

See a provider the same day for sunburn if:

• The burn is blistering over a large area
• You have fever, chills, nausea, vomiting, or dizziness (signs of sun poisoning)
• The face, hands, feet, or genitals are severely burned
• You show signs of dehydration (significantly decreased urination, extreme thirst, confusion)
• The person burned is an infant or young toddler — any significant sunburn in an infant requires prompt evaluation
• There are signs of skin infection in a blistered burn area (pus, spreading redness, increasing pain after the first 24 hours)

Protecting healing skin and preventing future burns

Healing sunburned skin needs protection. Keep it moisturized, avoid re-exposure while it heals, and once healed, apply broad-spectrum SPF 30 or higher sunscreen before going outside. Sunscreen should be applied 15–30 minutes before sun exposure and reapplied every two hours, or after swimming or sweating. The FDA recommends using broad-spectrum sunscreens that protect against both UVA and UVB radiation.

Beyond sunscreen, protective clothing, seeking shade during peak UV hours (10 a.m.–4 p.m.), and wearing a wide-brimmed hat significantly reduce UV exposure.

When to visit urgent care

Urgent care is the right stop for sunburns that go beyond what home care can handle — blistering over large areas, sun poisoning symptoms, or a sunburn that needs wound care and antibiotic treatment. They can assess severity, provide IV fluids for dehydration, prescribe oral steroids or topical treatments for severe burns, and ensure there's no sign of infection. Find a Solv urgent care near you and book ahead to skip the wait.