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Sunburn is the term for red, sometimes swollen, and painful skin caused by overexposure to ultraviolet (UV) rays from the sun. Sunburn can vary from mild to severe.

The extent depends on skin type and amount of exposure to the sun. Sunburn is a serious risk factor for skin cancer.

Because of variations in the intensity of UV radiation passing through the atmosphere, the risk of sunburn increases as you approach the equator. The higher the latitude, the lower the intensity of the UV rays.

On a minute-by-minute basis, the amount of UV radiation is dependent on the angle of the sun. The greatest risk is at solar noon when the sun is directly above you.

Fast facts on sunburn
Here are some key points about sunburn. More detail and supporting information is in the application

Sunburn is caused by ultraviolet light from the sun.
In some cases, it can cause the skin to blister.
Also can be soothed by home remedies.
Avoiding sunburn in the first place is better than having to treat its effects.
treatment and relief
1. Act Fast to Cool It Down
If you’re near a cold pool, lake or ocean, take a quick dip to cool your skin, but only for a few seconds so you don’t prolong your exposure. Then cover up and get out of the sun immediately. Continue to cool the burn with cold compresses. You can use ice to make ice water for a cold compress, but don’t apply ice directly to the sunburn. Or take a cool shower or bath, but not for too long, which can be drying, and avoid harsh soap, which might irritate the skin even more.
2. Moisturize While Skin Is Damp
While skin is still damp, use a gentle moisturizing lotion (but not petroleum or oil-based ointments, which may trap the heat and make the burn worse). Repeat to keep burned or peeling skin moist over the next few days.
3. Decrease the Inflammation
If it is safe for you to do so, take a nonsteroidal anti-inflammatory drug (NSAID), such as ibuprofen, naproxen or aspirin at the first sign of sunburn to help with discomfort and inflammation, You can also use an over-the-counter 1 percent cortisone cream as directed for a few days to help calm redness and swelling. Aloe vera may also soothe mild burns and is generally considered safe. Continue with cool compresses to help discomfort, wear loose, soft, breathable clothing to avoid further skin irritation and stay out of the sun entirely until the sunburn heals.