Sunburn chills typically last 24 to 48 hours, though in severe cases they can persist for up to three days. Chills are your body’s response to inflammation and skin damage from UV radiation, and they signal that your sunburn has crossed from a surface irritation into something your whole body is reacting to. The good news is that chills are usually the first systemic symptom to resolve as your skin begins to heal.
Why Sunburn Causes Chills
When UV rays damage a large area of skin, your body launches an inflammatory response. Part of that response involves your internal thermostat getting disrupted. Your damaged skin loses its ability to regulate temperature effectively, releasing heat faster than usual. Your body interprets this as being cold and triggers shivering to generate warmth, even if the air around you is perfectly warm.
This process also involves a mild fever in many cases. Your immune system floods the damaged tissue with inflammatory signals, and some of those signals raise your core body temperature. The mismatch between your rising internal temperature and the heat escaping through damaged skin creates that distinctive cycle of feeling feverish one moment and shivering the next.
The Timeline of Sunburn Chills
Sunburn pain typically starts within a few hours of UV exposure, with redness and irritation peaking at about 24 hours. Chills generally follow a similar pattern, appearing anywhere from 6 to 24 hours after sun exposure and intensifying as the burn reaches its worst point. For most people, the chills begin to fade once the burn stops getting worse, usually within 24 to 48 hours.
If your chills last longer than 48 hours or you develop a temperature above 103°F, that’s a different situation. A fever that high with confusion, a rapid pulse, or dizziness can indicate heat stroke, which requires emergency medical care. Even without those extremes, chills that drag on past three days suggest your body is struggling to recover and could benefit from professional evaluation.
Chills Often Mean Sun Poisoning
A standard mild sunburn doesn’t usually cause chills. If you’re shivering after a day in the sun, you’re likely dealing with what’s commonly called sun poisoning. This isn’t a medically defined condition so much as a label for a severe sunburn that produces symptoms beyond red, painful skin.
Sun poisoning causes symptoms that go deeper than the skin’s surface. Along with chills, you may notice blisters, severe pain or itching, headache, nausea and vomiting, dizziness, fatigue, dehydration, and a rapid heartbeat. Blisters are particularly common with sun poisoning and a reliable way to gauge severity. A burn that’s just red and tender is unlikely to give you chills, while one that’s blistering almost certainly will.
Sun poisoning lasts longer than a typical sunburn overall. While a mild burn may feel better in three to five days, a severe one with systemic symptoms like chills can take a week or more to fully resolve. The chills themselves clear up well before the skin finishes healing, but the fatigue and general feeling of being unwell can linger for several days after the shivering stops.
How to Get Relief From Sunburn Chills
The most important thing you can do is hydrate aggressively. Your damaged skin is pulling fluid from the rest of your body, and dehydration makes chills worse. Drink extra water for at least two to three days after a bad burn. If you’re also experiencing nausea or vomiting, small frequent sips work better than trying to drink large amounts at once. Sports drinks or oral rehydration solutions can help replace electrolytes lost through damaged skin.
Cool (not cold) compresses or a lukewarm bath can ease both the skin pain and the temperature fluctuations driving your chills. Avoid ice or very cold water, which can shock already-damaged skin and make the shivering worse. Over-the-counter pain relievers like ibuprofen or acetaminophen can help with both pain and the low-grade fever that often accompanies chills.
Dress in loose, breathable layers. This sounds counterintuitive when your skin hurts, but light clothing helps trap enough warmth to reduce shivering without overheating you. Keep all sunburned areas fully covered if you go outside again, since even brief additional UV exposure will intensify every symptom. Stay in a cool, comfortable indoor environment as much as possible during the first 48 hours.
Signs Your Sunburn Needs Medical Attention
Most sunburn chills resolve on their own with rest and fluids. But certain symptoms alongside chills warrant prompt medical care: a fever above 103°F, confusion or slurred speech, fainting, blisters covering a large portion of your body, or an inability to keep fluids down due to vomiting. A rapid, pounding pulse combined with dizziness is another signal that your body is in serious distress rather than simply recovering from a bad burn.
Children and older adults are more vulnerable to the systemic effects of severe sunburn. Their bodies regulate temperature less efficiently, so chills can escalate faster and dehydration sets in more quickly. If a child develops chills after a sunburn, earlier intervention is generally smarter than waiting to see if the symptoms pass on their own.