All About Health, Beauty & Wellness


How Prolonged and Excessive
Sun Exposure can Age the Skin

  • Posted   Mar 6, 2017
  • By Webmaster

What is Photoaging?

Photoaging is the premature aging of the skin due to excessive and prolonged sun exposure.

How does photoaging occur?

  • The sun emits 3 ultraviolet (UV) rays: UVA, UVB, and UVC.
  • The earth’s ozone layer blocks the UVC rays and 90% of the UVB rays.
  • 10% of UVB rays and 95% of UVA rays can pass through the ozone layer, eventually reaching the skin.
  • UVB rays penetrate the outermost layer of the skin (epidermis), but the longer UVA rays can go deeper to the next layer of the skin (dermis).
  • Too much exposure to UVB rays can cause skin redness that can lead to sunburn. It can also result to overproduction of cells leading to an irregular pattern and a thicker skin, making it rough and dry.UVB rays also damages the DNA of the epidermiscausing skin cells to mutate that may result to skin cancer over time.
  • Excessive UVA rays damage the elastin fibers that are found in the dermis. Elastin fibers allow the skin to go back to its shape when stretched. The loss of elastin fibers results to wrinkles.
  • Excessive UVA rays also damage the collagen fibers found in the dermis. Collagen fibers make the skin strong and resilient. The loss of collagen fibers results to sagging skin.
  • Too much UVA rays also damage the delicate blood vessels of the skin, making them more fragile and prone to bruising. It can also result to skin tumors (benign or malignant).

Signs of Photoaging

  • Wrinkles, fine lines, and pronounced lines of facial expressions
  • Loss of skin firmness
  • Loose and sagging skin
  • Uneven skin tone
  • Age spots
  • Appearance of dilated blood vessels on the skin
  • Development of skin tumors