Sun poisoning responds best to a combination of cooling the skin, managing pain and inflammation with over-the-counter medications, and aggressive hydration. Unlike a mild sunburn that just stings for a day or two, sun poisoning involves a more intense skin reaction, often with blistering, swelling, and whole-body symptoms like fever, chills, nausea, or headache. The good news is that most cases can be managed at home if you act quickly and use the right approach.
Sun Poisoning vs. Regular Sunburn
Sun poisoning is not a formal medical diagnosis but rather an umbrella term for severe sunburn reactions and a related condition called polymorphic light eruption (sometimes called sun allergy). A standard sunburn causes red, tender skin that heals within a few days. Sun poisoning goes further: you may develop dense clusters of small bumps and blisters, inflamed raised patches, and intense itching or burning. The skin can look bright red and may ooze.
What really separates sun poisoning from an ordinary sunburn is the systemic response. Fever, chills, headache, nausea, and vomiting can all accompany the skin damage. If you feel like you have the flu after a day in the sun, that’s a sign your body is dealing with something more serious than surface-level irritation.
Cool the Skin Down First
Your first priority is reducing heat and inflammation in the affected skin. Apply a cool, damp cloth or compress and hold it gently against the burn until your skin feels cooler to the touch. You can repeat this as often as needed throughout the day. A cool (not ice-cold) bath or shower also works. Avoid ice directly on the skin, which can cause further damage to tissue that’s already compromised.
After cooling, pat your skin dry gently and apply aloe vera gel. The anti-inflammatory properties in aloe calm stinging and discomfort while helping the skin retain moisture. Pure aloe gel from the plant or a bottle without added fragrances or alcohol works best. Follow up with a fragrance-free moisturizing cream or lotion, and reapply it frequently over the first few days to prevent excessive dryness and support healing.
Over-the-Counter Medications That Help
Take a pain reliever like ibuprofen or acetaminophen as soon as possible after the burn occurs. Ibuprofen is particularly useful because it reduces both pain and inflammation, tackling two problems at once. The sooner you start, the more effectively it can limit the inflammatory cascade in your skin.
For itching, especially once the skin starts to peel and heal, an oral antihistamine like diphenhydramine can provide relief. Keep in mind that diphenhydramine causes drowsiness, so it’s best taken at night. If the itch is more localized, a thin layer of 1% hydrocortisone cream applied to the affected area can help without the sedating side effects of an oral antihistamine.
Hydration Is Critical
Severe sun exposure pulls fluid toward the surface of your skin, and the resulting inflammation increases fluid loss from the body. You need to actively replace what you’re losing. Water is the foundation, but sports drinks help maintain your electrolyte balance, which matters when your body is working overtime to repair damaged tissue.
Avoid caffeinated coffee, tea, soda, and alcohol during recovery. All of these can worsen dehydration. If you’re experiencing vomiting alongside the sunburn, staying hydrated becomes even more important, and small, frequent sips of an electrolyte solution may be easier to keep down than large glasses of water. For children, pediatric electrolyte solutions like Pedialyte are a better choice than homemade salt-and-sugar mixtures.
What Recovery Looks Like
Most cases of sun poisoning follow a predictable arc. The worst pain and redness typically peak within the first 24 to 72 hours. Blisters, if they form, usually appear within the first day or two. Resist the urge to pop them. Intact blisters act as a natural bandage, protecting the raw skin underneath from bacteria and infection. If a blister breaks on its own, gently clean the area and apply a light layer of petroleum jelly or antibiotic ointment.
Peeling generally begins a few days after the initial burn as your body sheds the damaged skin cells. This phase can be intensely itchy. Moisturizing frequently and using antihistamines as needed will get you through it. Avoid picking or pulling at peeling skin, which can tear healthy tissue beneath and increase the risk of scarring or infection.
Full healing for a severe case can take one to two weeks. During this entire period, keep the affected skin completely out of the sun. Newly healed skin is far more vulnerable to UV damage and will burn much faster than normal.
Signs You Need Medical Attention
Most sun poisoning is miserable but manageable at home. However, certain symptoms signal that you need a doctor. Seek medical care if you develop blisters alongside any of the following:
- Bright red, oozing skin that isn’t improving
- Severe pain that over-the-counter medications can’t control
- Fever or intense shivering
- Headache, nausea, or vomiting
- A rash that is widespread or painful
In severe cases, hospital treatment may involve intravenous fluids to compensate for significant fluid loss and prescription corticosteroids to shorten the course of inflammation and reduce pain. These stronger interventions are reserved for burns that cover a large area of the body or come with dangerous dehydration. Very severe second-degree burns covering a large percentage of the body may require care at a specialized burn unit.
Preventing It From Happening Again
If you’ve had sun poisoning once, your skin has shown you its threshold, and you’re likely to react the same way (or worse) with similar exposure. Broad-spectrum sunscreen with SPF 30 or higher is essential, but it’s only one layer of protection. Reapply every two hours and immediately after swimming or sweating.
Physical barriers matter just as much as sunscreen. Tightly woven clothing, wide-brimmed hats, and UV-blocking sunglasses protect skin that sunscreen often misses. Seek shade during peak UV hours, roughly 10 a.m. to 4 p.m., when the sun’s rays are most intense. If you’re prone to polymorphic light eruption, gradual sun exposure at the start of the season can help your skin build some tolerance, but this should be done carefully and in short increments rather than all at once.