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 main article.
Sunburn is caused by ultraviolet light from the sun.
In some cases, sunburn can cause the skin to blister.
Sunburn can be soothed by home remedies.
Avoiding sunburn in the first place is better than having to treat its effects.
Symptoms of sunburn
Sunburn can be very uncomfortable indeed.
The symptoms of sunburn vary from person to person. You may not notice redness of the skin for several hours after the burn has begun. Peak redness will take 12-24 hours.
Minor sunburns typically cause nothing more than slight redness and tenderness to the affected areas.
In more serious cases, blistering can occur. Extreme sunburns can be painful to the point of debilitation and may require hospital care.
In much more severe cases, symptoms include:
nausea and vomiting
In extreme cases, symptoms of shock can occur, for instance:
low blood pressure
Sunburn can occur in less than 15 minutes, but the harm is often not immediately obvious.
After the exposure, skin may turn red in as little as 30 minutes, but most often takes 2-6 hours. Pain is usually most extreme 6-48 hours after exposure. The burn continues to develop for 24-72 hours, sometimes followed by peeling skin in 3-8 days.
Some peeling and itching may continue for several weeks.
Treatments for sunburn
It is important to start treatment for sunburn as soon as possible. Sunburn can lead to permanent skin damage and increase the risk of skin cancer. The following are some simple ways to ease the discomfort of sunburn; however, it important to bear in mind that the best way to relieve suffering is to avoid being sunburned in the first place: