When UV rays hit the skin, they damage its DNA, and cells in the dermis scramble to produce melanin in the epidermis to prevent further damage. This is the process that gives you a tan, which is really just your skin attempting to block the radiation from penetrating your skin.
The UVA rays, with their longer wavelength, are responsible for much of the damage we associate with photoaging. UVA rays penetrate deep into the dermis, where they damage the collagen fibers. This damage causes increased production of abnormal elastin. The unusual amounts of elastin result in the production of enzymes called metalloproteinases. These enzymes, which rebuild damaged collagen, often malfunction and degrade the collagen, resulting in incorrectly rebuilt skin.
As this process is repeated with daily UVA exposure, the incorrectly rebuilt skin forms wrinkles, and the depleted collagen results in leathery skin. While sunlight is the number one cause of skin aging, about 10 percent comes from HEV and infrared light. HEV, or high-energy blue visible light, which emits from the sun and devices such as your phone or computer and can be seen by the human eye.
Infrared light is invisible to the eye and rather is felt as heat, like in a microwave. Fortunately, neither of these has been linked to skin cancer, but they have been shown to break down collagen and skin elasticity. In recent years, some research is focusing on the additional effects of these other light forms may have on the skin.
Ultraviolet light damages your genetic material DNA every time you are in the sun. To convince yourself, compare the skin on the back of your hands with the skin on the inside of your upper arm. The upper arm looks better in everyone. But how can an average consumer discern the hype from solid truth? Mehmet Oz, MD. When your skin is exposed to the sun, it's susceptible to sunburn and other damage from harmful UVA How should I protect my feet from the sun?
Christopher Chiodo, MD. It's easy to forget your feet when you put on sunscreen, but if you're wearing sandals or going A blister is one of the body's responses to injury or friction. Severe blushing can make it difficult for the person to feel comfortable in social or professional situations. Content on this website is provided for information purposes only.
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Summary Read the full fact sheet. On this page. Wrinkles and age Wrinkles and sun exposure Smoking and wrinkles Frowning and squinting and wrinkles Treatment for wrinkles Where to get help. Wrinkles and age Elastin and collagen fibres give the skin suppleness and strength. Wrinkles and sun exposure Sun exposure is the most common cause of skin damage and wrinkling. The best way to prevent wrinkling caused by sun exposure is to: Wear protective clothing.
Avoid the sun around the middle of the day. Smoking and wrinkles As well as all the other health risks associated with smoking , smokers will have more wrinkles.
Other treatments include: Injection of botulinum toxin paralyses the muscles under the skin responsible for deep wrinkles, as well as fine lines around the eyes and mouth. The effects of a single injection may last six to nine months. Experience is required by the doctor performing the procedure to make sure there is no loss of power to the muscles responsible for facial expression.
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