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The sun has a profound effect over years of exposure on the skin, causing premature skin aging, skin cancer, and many other skin changes. Exposure to ultraviolet (UV) light from the sun accounts for most premature skin aging. Many skin changes that were commonly believed to be due to aging, such as easy bruising, are actually a result of prolonged exposure to the sun.
Skin texture changes caused by UV exposure (eg, from sunbathing, tanning) include thick skin in coarse wrinkles, especially on the back of the neck (cutis rhomboidalis nuchae), and thinning of the skin causing fine wrinkles, easy bruising, and skin tearing, particularly on the forearms and back of the hands.
Blood vessel changes lead to bruising with only minor trauma in sun-exposed areas. The sun also causes the appearance of tiny blood vessels (telangiectasias) in the skin, especially on the face.
Protect yourself against daily sun damage by applying sun protection prior to every time you are going to be in direct or indirect contact with the sun. Choose a product with a Sun Protection Factor (SPF) of 15 or higher. It should give broad-spectrum UVA and UVB treatment. Daily sun defense with a moisturizer is the best selection for defending against incidental UV exposure.