Sun poisoning is a condition that can occur after prolonged sun exposure, time in hot environments, or intense physical activity, leading to a rapid increase in body temperature. It can trigger symptoms such as headache, nausea, and general discomfort, and may quickly progress to more serious complications.
In more severe cases, sun poisoning can cause dehydration, fainting, confusion, and even seizures due to the body’s inability to regulate heat. These symptoms are often linked to fluid loss and overheating, which can affect vital organs and increase the risk of burns and nervous system problems.
Sun poisoning can be managed with prompt care, including cooling the body, staying hydrated, and using soothing skin treatments, while severe symptoms may require hospital evaluation. Preventive measures such as using sunscreen, wearing protective clothing, and avoiding peak sun hours are essential to reduce the risk.
Sun poisoning symptoms
Symptoms of sun poisoning happen when body temperature rises quickly. Some common symptoms include:
- Very red, hot, and dry skin
- Headache
- Increased heart rate and respiratory rate
- Increased thirst, dry mouth, and dry eyes
- Nausea, vomiting, and diarrhea
- Decreased level of consciousness and confusion
- Fainting
- Weakness
People with sun poisoning may become disoriented about who they are, where they are, or what time it is.
Common causes
The main cause of sun poisoning is prolonged sun exposure without protection, such as not using sunscreen or wearing a hat, which can quickly raise body temperature and trigger symptoms.
It can also happen during heavy exercise, in very hot environments, or when wearing too many layers of clothing. According to the CDC, these conditions can increase the risk of heat-related illness.
Why it’s serious
Although symptoms may seem mild and go away on their own, sun poisoning can still pose serious health risks. The main risks include:
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Second- or third-degree burns
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Increased risk of infection in burned skin
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Dehydration
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Vomiting and diarrhea, which can worsen dehydration
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Nervous system problems, such as seizures, brain damage, or coma
These dangers occur when the body cannot sweat properly or control its temperature, and this can continue even after you get out of the sun. A very high body temperature can cause rapid fluid loss, leading to the loss of important vitamins and minerals needed for the body to function properly.
Treatment options
If you start to experience sun poisoning, move to a cool, well‑ventilated, shaded place and drink plenty of fluids to prevent dehydration. You can apply a moisturizing or after‑sun cream to protect your skin and take a cool bath or shower to help lower your body temperature.
According to the CDC, worsening symptoms, fainting, vomiting, or signs of more severe heat-related illness require urgent medical attention and rapid cooling.
Prevention measures
To help prevent sun poisoning, you can:
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Apply a sunscreen suitable for your skin type at least 15 minutes before going into the sun.
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Drink plenty of fluids throughout the day, especially when it is hot.
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Avoid direct sun during the hottest hours of the day (about 12 p.m. to 4 p.m.) and stay in shaded, cool, well‑ventilated areas when possible.
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Reapply sunscreen every 2 hours if you are swimming or sweating.
You should also be sure to wear a hat and loose, long‑sleeved clothing to protect your skin and help prevent sunburn.