A Answers (4)
Mehmet Oz, MD, Cardiology, answeredSunlight contains invisible ultraviolet (UV) light waves, which damage the skin during prolonged exposure. Watch the animation to learn more about the effects of sunburn.
Honor Society of Nursing (STTI) answered
Sunburns happen when the skin is exposed to too much ultraviolet (UV) light. There are two types: UVA and UVB. Both UVA and UVB are present in sunlight and both can cause skin damage. The UVB wavelengths are the main cause of sunburn. UVA penetrates into deeper layers of skin. Each time you expose your skin to harmful UV rays, you accelerate the breakdown of collagen and elastin, which may cause you to see wrinkles and fine lines before you reach your 40s and 50s. UV rays also can cause skin cancer.
Use a sunscreen and wear protective clothing to safeguard your skin from the sun’s harmful rays.
The sun shines light that the human eye can't see, like infrared and ultraviolet. Ultraviolet (UV) light, also known as UV radiation, can be categorized as UVA, UVB, and UVC. UVC waves are blocked by the atmosphere from reaching the earth's surface. UVA can penetrate relatively deeply into skin and as a result can indirectly cause premature aging or lead to the development of certain types of skin cancers. UVB can cause direct damage to DNA in skin cells. A sunburn is essentially a radiation burn, when the DNA and tissue is overly damaged by UV rays.
Ultraviolet (UV) light from the sun can be damaging to the skin. Over long periods of time, low-doses of sunlight causes tanning and skin thickening. Too much sun light, too quickly, can burn the skin. Most sunburns are limited to the outer skin layer. The skin becomes red and tender and may peel during the healing process.
UV light makes the skin red because blood vessels in the skin dilate. This redness appears several hours after exposure and peaks by 1 day. The skin releases inflammatory messengers, and skin cells may become damaged or die. Over time, collagen can be permanently damaged. Long-term UV exposure is associated with the development of skin cancers such as melanoma, basal cell carcinoma and squamous cell carcinoma.
Pigment actually protects you against UV light, and patients with lighter skin are at a higher risk for burns than patients with darker skin. People with the highest risk have very fair skin, blue eyes, and red or blond hair.