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Setyawan Awan Rahadi
Texture Changes Caused by the Sun
UV exposure causes thickening and thinning of the skin. Thick skin is fo
und in coarse wrinkles especially on the back of the neck that do not disappear when the skin is stretched.A condition called solar elastosis is seen as thickened, coarse wrinkling and yellow discoloration of the skin. A common effect of UV exposure is thinning of the skin causing fine wrinkles, easy bruising, and skin tearing.
Blood Vessel Changes Caused by the Sun
UV radiation causes the walls of blood vessels to become thinner leading to bruising with only minor trauma in sun-exposed areas. For example, most of the bruising that occurs on sun-damaged skin occurs on the backs of the hands and forearms not on the inside of the upper arm or even the inside of the forearm. The sun also causes the appearance of telangiectasias tiny blood vessels, in the skin especially on the face.
Pigment Changes Caused by the Sun
The most noticeable sun-induced pigment change is a freckle or solar lentigo. Light-skinned people tend to freckle more noticeably. A freckle is caused when the melanin-producing cell, or melanocyte, is damaged causing it to get bigger. Large freckles, also known as age spots or liver spots, can be seen on the backs of the hands, chest, shoulders, arms, and upper back. These are not actually age related but sun-damage related. UV exposure can also cause white spots especially on the legs, but also on the backs of the hands and arms, as melanocytes are destroyed
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