Sun poisoning is a severe sunburn that goes beyond ordinary redness, often bringing blisters, fever, chills, nausea, and intense pain. Fixing it requires aggressive cooling, hydration, the right over-the-counter treatments, and knowing which products to avoid entirely. While a mild sunburn fades within about three days, sun poisoning symptoms last longer and hit harder, sometimes requiring medical attention.
How to Tell It’s Sun Poisoning
A regular sunburn gives you redness, tenderness, and skin that feels hot. Sun poisoning layers systemic symptoms on top of that: fever, chills, nausea or vomiting, headache, dizziness, and sometimes confusion. The skin itself may blister, swell significantly, or develop a bumpy, itchy rash rather than just turning red.
Some people experience a related condition called polymorphous light eruption, which produces dense clusters of small bumps, raised rough patches, or blisters, usually on areas that were covered during winter but exposed in warmer months like the upper chest, neck, and arms. This rash typically appears 30 minutes to several hours after sun exposure and tends to strike in spring and early summer. It often recurs yearly and first shows up in your teens or twenties. If your reaction looks more like a bumpy rash than a classic burn, this may be what’s happening.
Cool the Skin Immediately
The first priority is pulling heat out of the skin. Apply a clean towel dampened with cool tap water to the burned areas for about 10 minutes, and repeat this several times throughout the day. A cool bath works too. Adding roughly 2 ounces (about 4 tablespoons) of baking soda to the tub can help soothe irritation. Avoid ice or ice-cold water, which can shock damaged skin and restrict blood flow right when you need healing to begin.
After cooling, apply a moisturizer or aloe vera gel. Chilling these products in the refrigerator beforehand adds an extra layer of relief. Skip anything containing alcohol, which dries out already damaged skin and increases irritation.
Hydrate Aggressively
Sun poisoning pulls fluid toward your skin’s surface as part of the inflammatory response, which means the rest of your body can become dehydrated fast. Drink extra water for at least a full day after the burn. If you were also sweating heavily or exercising in the heat when you got burned, an electrolyte drink can help restore what you lost. A reasonable approach is to start with water and switch to an electrolyte beverage if you’ve been sweating for an extended period.
Signs of dehydration to watch for include dark urine, dizziness when standing, dry mouth, and a rapid heartbeat. These overlap with sun poisoning symptoms, which is exactly why staying ahead of fluid loss matters.
Pain Relief That Actually Helps
Take ibuprofen or acetaminophen as soon as possible after the burn. Ibuprofen is particularly useful because it reduces both pain and inflammation. Don’t wait for the pain to peak before taking it.
For the skin itself, a nonprescription 1% hydrocortisone cream applied three times a day for three days can reduce swelling and discomfort. If the burn is severe enough that over-the-counter options aren’t cutting it, a doctor can prescribe a stronger corticosteroid cream. Once the skin starts peeling, an oral antihistamine like diphenhydramine (the active ingredient in Benadryl) can help with the intense itching that comes during healing.
Products to Avoid on Burned Skin
This is where people often make things worse. Avoid any product labeled with “-caine” ingredients, particularly benzocaine and lidocaine. These topical anesthetics are found in many over-the-counter sunburn sprays and gels, but they can trigger allergic reactions ranging from mild irritation to severe dermatitis. Sunburned skin is already compromised, making it far more reactive to allergens than healthy skin. Benzocaine specifically has been linked to a rare but serious condition that reduces the blood’s ability to carry oxygen.
Also skip petroleum-based products, butter, or heavy oils. These trap heat in the skin. Stick to water-based moisturizers and aloe vera.
What Recovery Looks Like
Mild to moderate sunburns start fading around the three-day mark. Sun poisoning takes longer. Expect the worst pain and swelling in the first 24 to 48 hours, with blisters potentially forming during that window. Peeling usually begins a few days after the initial burn and can continue for a week or more. During this phase, resist the urge to pull peeling skin off. Let it shed naturally to protect the new skin forming underneath.
The full cycle from initial burn to complete healing can stretch to two weeks or longer depending on severity. Your skin will remain extra sensitive to the sun during this entire period, so keep burned areas covered or stay indoors when possible.
When It Needs Medical Attention
Seek immediate medical care if you develop blisters covering a large area, a fever with chills, nausea or vomiting, or confusion. These signs suggest your body is struggling with the systemic effects of the burn and may need professional intervention, including prescription-strength treatments or IV fluids for dehydration. Children, older adults, and people on medications that increase sun sensitivity are at higher risk for dangerous reactions.
Preventing It From Happening Again
If you’ve had sun poisoning once, your skin has already shown you it’s vulnerable. Use a broad-spectrum, water-resistant sunscreen with at least SPF 30 on all exposed skin, and reapply every two hours or after swimming. Clothing matters more than most people realize: a white t-shirt provides an SPF of only about 7, while a long-sleeved denim shirt provides roughly SPF 1,700. For reliable protection, look for clothing labeled with a UPF (ultraviolet protection factor) rating.
The American Academy of Dermatology recommends combining sun-protective clothing with shade and sunscreen rather than relying on any single strategy alone. Peak UV hours, generally between 10 a.m. and 4 p.m., are when your risk is highest. If you experienced polymorphous light eruption, be especially cautious in spring and early summer when your skin hasn’t yet adjusted to increased sun exposure.